[llvm][blake3] Prefix blake3_hash4_neon
In #147948 blake3_hash4_neon became a public symbol (no longer static).
Like other APIs introduced, it was not prefixed, resulting in conflicts if
libblake3 and LLVM are both linked statically into the same binary.
diff --git a/llvm/lib/Support/BLAKE3/llvm_blake3_prefix.h b/llvm/lib/Support/BLAKE3/llvm_blake3_prefix.h
index d246574..efdd65b 100644
--- a/llvm/lib/Support/BLAKE3/llvm_blake3_prefix.h
+++ b/llvm/lib/Support/BLAKE3/llvm_blake3_prefix.h
@@ -41,5 +41,6 @@
#define blake3_hash_many_avx512 llvm_blake3_hash_many_avx512
#define _blake3_hash_many_avx512 _llvm_blake3_hash_many_avx512
#define blake3_hash_many_neon llvm_blake3_hash_many_neon
+#define blake3_hash4_neon llvm_blake3_hash4_neon
#endif /* LLVM_BLAKE3_PREFIX_H */
