www/qt6-webengine: fix build on armv6/armv7 (again)

Re-add an extra file to the build that was accidentally deleted in a
previous update to the port.

Approved by:	portmgr (build fix blanket)
Fixes:		9a0a6ca
MFH:		2023Q4
PR:		272422

www/qt6-webengine/files/patch-src_3rdparty_chromium_third__party_boringssl_BUILD.generated.gni

@@ -1,14 +1,19 @@
---- src/3rdparty/chromium/third_party/boringssl/BUILD.generated.gni.orig	2023-03-28 19:45:02 UTC
+--- src/3rdparty/chromium/third_party/boringssl/BUILD.generated.gni.orig	2023-09-07 16:02:00 UTC
 +++ src/3rdparty/chromium/third_party/boringssl/BUILD.generated.gni
-@@ -78,6 +78,7 @@ crypto_sources = [
+@@ -78,10 +78,12 @@ crypto_sources = [
    "src/crypto/cpu_aarch64_apple.c",
    "src/crypto/cpu_aarch64_fuchsia.c",
    "src/crypto/cpu_aarch64_linux.c",
 +  "src/crypto/cpu_aarch64_openbsd.c",
    "src/crypto/cpu_aarch64_win.c",
    "src/crypto/cpu_arm.c",
    "src/crypto/cpu_arm_linux.c",
-@@ -184,6 +185,7 @@ crypto_sources = [
+   "src/crypto/cpu_arm_linux.h",
++  "src/crypto/cpu_arm_freebsd.c",
+   "src/crypto/cpu_intel.c",
+   "src/crypto/cpu_ppc64le.c",
+   "src/crypto/crypto.c",
+@@ -184,6 +186,7 @@ crypto_sources = [
    "src/crypto/rand_extra/deterministic.c",
    "src/crypto/rand_extra/forkunsafe.c",
    "src/crypto/rand_extra/fuchsia.c",