Merge bitcoin#25739: Update leveldb subtree

f608f25 Squashed 'src/leveldb/' changes from 330dd6235f..22f1e4a02f (fanquake)

Pull request description:

  Replaces bitcoin#25463 (for master).

  Includes:
  - bitcoin-core/leveldb-subtree#32

  Guix Build (arm64):
  ```bash
  ed41ae2555ae3b638b65d870cef385805e621481831ae992e84645f5c234af63  guix-build-bec911e37ac8/output/arm-linux-gnueabihf/SHA256SUMS.part
  7d8237026bfccedee0e56e14d7b89cf2dcb52195b94070dc4b6c3c6970fdc774  guix-build-bec911e37ac8/output/arm-linux-gnueabihf/bitcoin-bec911e37ac8-arm-linux-gnueabihf-debug.tar.gz
  1afeff9d70864be66f7ac48d31d1977c7844e2cc117d3f0438fb2f9c6f6a56a4  guix-build-bec911e37ac8/output/arm-linux-gnueabihf/bitcoin-bec911e37ac8-arm-linux-gnueabihf.tar.gz
  ab2df265897a0142093b582d3c61e2b17a713d93e478b47c7aa2b0a677295007  guix-build-bec911e37ac8/output/arm64-apple-darwin/SHA256SUMS.part
  025a52babdee479800801e951f6fe1fe490e1f5fe8361104eb85e7b0319cdb37  guix-build-bec911e37ac8/output/arm64-apple-darwin/bitcoin-bec911e37ac8-arm64-apple-darwin-unsigned.dmg
  7b2992bf5543891b1e6ef4f48c52fc5febc58cc31ccf4307edd27d4d630aa54a  guix-build-bec911e37ac8/output/arm64-apple-darwin/bitcoin-bec911e37ac8-arm64-apple-darwin-unsigned.tar.gz
  3d93eb009ab6459cdca5fe767795f94ba5e00e5969e44bac19c7a5f344d42030  guix-build-bec911e37ac8/output/arm64-apple-darwin/bitcoin-bec911e37ac8-arm64-apple-darwin.tar.gz
  b8c30c5c561c96bc4e280ececc0dd1cd673bc6194591b848903aa6c54c9d37cf  guix-build-bec911e37ac8/output/dist-archive/bitcoin-bec911e37ac8.tar.gz
  cb2632b9b5ff473e504d3d6244191eb5a852718f8ac8bb1032ba1c65e07d6b3f  guix-build-bec911e37ac8/output/powerpc64-linux-gnu/SHA256SUMS.part
  26ecc2f42ce37f8bd7ba24bf2f80f493cd1fd45b58409de71c44e2445c291c8c  guix-build-bec911e37ac8/output/powerpc64-linux-gnu/bitcoin-bec911e37ac8-powerpc64-linux-gnu-debug.tar.gz
  4a83381ea472cc71b4a1c6569483a7e85a5f53065c1633828bf7a75d357b0297  guix-build-bec911e37ac8/output/powerpc64-linux-gnu/bitcoin-bec911e37ac8-powerpc64-linux-gnu.tar.gz
  455a9af5e7ee1c2857d87abec29284ae7bb447cf7cb2b3befa2f8e0a0a8cbec6  guix-build-bec911e37ac8/output/powerpc64le-linux-gnu/SHA256SUMS.part
  3445f53fd150032ec3c3f324e001b4ecf72728900961a7a7789c32ceb7616617  guix-build-bec911e37ac8/output/powerpc64le-linux-gnu/bitcoin-bec911e37ac8-powerpc64le-linux-gnu-debug.tar.gz
  baefeaac88bb4fbf8662c8e1150b043aa2534535a82e828c13e971d2c5fa5cbd  guix-build-bec911e37ac8/output/powerpc64le-linux-gnu/bitcoin-bec911e37ac8-powerpc64le-linux-gnu.tar.gz
  543484396a47def1636d4e54d4a105c7093265c8896165a4140edec10aeef880  guix-build-bec911e37ac8/output/riscv64-linux-gnu/SHA256SUMS.part
  ac1f6e57016703f1319a3ef80014581aee96053e56525b8cd11ada2395496b86  guix-build-bec911e37ac8/output/riscv64-linux-gnu/bitcoin-bec911e37ac8-riscv64-linux-gnu-debug.tar.gz
  f9a2b65ed21f777524b078046c84b98239b0fbb92eae8d840bc7a25cab0eec6d  guix-build-bec911e37ac8/output/riscv64-linux-gnu/bitcoin-bec911e37ac8-riscv64-linux-gnu.tar.gz
  a08ed0ee78ab1c4c815ba8368f1a21d3bd4327ce1104cb3793d63edd2bde1ef4  guix-build-bec911e37ac8/output/x86_64-apple-darwin/SHA256SUMS.part
  74059397c6c8f0e899b60415d1aae04f2f7df18b8f39cea9f314e5e0c2e0ede6  guix-build-bec911e37ac8/output/x86_64-apple-darwin/bitcoin-bec911e37ac8-x86_64-apple-darwin-unsigned.dmg
  6909ff6f59b78059d505f2b98e6fad63a4e3deb843566061c4cd6e94be1de066  guix-build-bec911e37ac8/output/x86_64-apple-darwin/bitcoin-bec911e37ac8-x86_64-apple-darwin-unsigned.tar.gz
  21b45719d927422acc69662108e7255d8cd0b1d832493e70c622c1b1b3a3a314  guix-build-bec911e37ac8/output/x86_64-apple-darwin/bitcoin-bec911e37ac8-x86_64-apple-darwin.tar.gz
  b5fdee6fd2dbcdaa6302f388c7fcaa6d130ff91fd5760e19facf6e24c7216ef6  guix-build-bec911e37ac8/output/x86_64-linux-gnu/SHA256SUMS.part
  56db24b0b0d2f463c8085a12502977c6d4f4ee5b85484e52522361f54ab3a6aa  guix-build-bec911e37ac8/output/x86_64-linux-gnu/bitcoin-bec911e37ac8-x86_64-linux-gnu-debug.tar.gz
  96dbe08e2ed0f68fe734dd6f0280c2d22af7b56c84debde424367054f118173f  guix-build-bec911e37ac8/output/x86_64-linux-gnu/bitcoin-bec911e37ac8-x86_64-linux-gnu.tar.gz
  70ac424b229befb2834a8a02ce27551e3ddde2d438497e8c11a3cedf0cea5d3c  guix-build-bec911e37ac8/output/x86_64-w64-mingw32/SHA256SUMS.part
  bad144a599b28e8dc0018cc2fd1754543e79df39d651e58f565c197241f2b8cb  guix-build-bec911e37ac8/output/x86_64-w64-mingw32/bitcoin-bec911e37ac8-win64-debug.zip
  7ce2e72621eb070a8d23b7edbaaccc9f06257b82b9851c1cad4c61f08d2c7451  guix-build-bec911e37ac8/output/x86_64-w64-mingw32/bitcoin-bec911e37ac8-win64-setup-unsigned.exe
  5f726ef8b478e3ac90b93cd3ae3c38a0e7bffa5f80306c46a7535518a73251c7  guix-build-bec911e37ac8/output/x86_64-w64-mingw32/bitcoin-bec911e37ac8-win64-unsigned.tar.gz
  87cf1a23e948e471ed35c6a518813505c907c58788b55665829e7f12f33bd312  guix-build-bec911e37ac8/output/x86_64-w64-mingw32/bitcoin-bec911e37ac8-win64.zip
  ```

ACKs for top commit:
  hebasto:
    ACK bec911e, I have reviewed the code and it looks OK, I agree it can be merged.
  jarolrod:
    ACK bec911e

Tree-SHA512: 190381d9489ec6cc52bb9557750925c8574f1344eb6893095e9e31e66a579bd1bc283e8cbfcba52cec3fb072985895f929103b6f5351a23f908bdd0a04b474f1

src/leveldb/util/env_posix.cc

@@ -49,7 +49,7 @@ constexpr const int kDefaultMmapLimit = (sizeof(void*) >= 8) ? 4096 : 0;
 int g_mmap_limit = kDefaultMmapLimit;
 
 // Common flags defined for all posix open operations
-#if defined(HAVE_O_CLOEXEC)
+#if HAVE_O_CLOEXEC
 constexpr const int kOpenBaseFlags = O_CLOEXEC;
 #else
 constexpr const int kOpenBaseFlags = 0;