Merge bitcoin#17752: doc: fix directory path for secp256k1 subtree in…

… developer-notes

a5089f6 fix directory path for secp256k1 subtree in developer-notes (hackerrdave)

Pull request description:

  Documentation update to fix the directory path of the `secp256k1` subtree in the developer notes

ACKs for top commit:
  laanwj:
    ACK a5089f6

Tree-SHA512: d0986721d7091af26edaee769db78c9aabac25bbaddb2a1bfa96c7208187226e280e9c38897b5227ee6c9e40d5a1af86bb7c58e72c6a30a94a478c4bf54c086e

src/Makefile.test.include

@@ -243,7 +243,7 @@ endif
 
 if ENABLE_FUZZ
 test_fuzz_block_SOURCES = $(FUZZ_SUITE) test/fuzz/block.cpp
-test_fuzz_block_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
+test_fuzz_block_CPPFLAGS = $(AM_CPPFLAGS) $(SYSCOIN_INCLUDES)
 test_fuzz_block_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 test_fuzz_block_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
 test_fuzz_block_LDADD = $(FUZZ_SUITE_LD_COMMON)