apply BLAKE3-team/BLAKE3#443

caused
```
/Users/runner/work/php-src/php-src/ext/hash/blake3/upstream_blake3/c/blake3_dispatch.c:237:26: error: unused variable 'features' [-Werror,-Wunused-variable]
  const enum cpu_feature features = get_cpu_features();
```
on 32bit x86-32 linux builds.

Author: divinity76

ext/hash/blake3/patches.diff

@@ -19,3 +19,17 @@ index af6c3dadc7..af3bf17bbe 100644
 
  void blake3_compress_in_place(uint32_t cv[8],
                                const uint8_t block[BLAKE3_BLOCK_LEN],
+
+diff --git a/ext/hash/blake3/upstream_blake3/c/blake3_dispatch.c b/ext/hash/blake3/upstream_blake3/c/blake3_dispatch.c
+index 17c184acf5..d77bd1bb08 100644
+--- a/ext/hash/blake3/upstream_blake3/c/blake3_dispatch.c
++++ b/ext/hash/blake3/upstream_blake3/c/blake3_dispatch.c
+@@ -235,6 +235,8 @@ void blake3_xof_many(const uint32_t cv[8],
+   }
+ #if defined(IS_X86)
+   const enum cpu_feature features = get_cpu_features();
++// https://github.com/BLAKE3-team/BLAKE3/pull/443
++  MAYBE_UNUSED(features);
+ #if !defined(_WIN32) && !defined(BLAKE3_NO_AVX512)
+   if (features & AVX512VL) {
+     blake3_xof_many_avx512(cv, block, block_len, counter, flags, out, outblocks);

ext/hash/blake3/upstream_blake3/c/blake3_dispatch.c

@@ -235,6 +235,8 @@ void blake3_xof_many(const uint32_t cv[8],
   }
 #if defined(IS_X86)
   const enum cpu_feature features = get_cpu_features();
+// https://github.com/BLAKE3-team/BLAKE3/pull/443
+  MAYBE_UNUSED(features);
 #if !defined(_WIN32) && !defined(BLAKE3_NO_AVX512)
   if (features & AVX512VL) {
     blake3_xof_many_avx512(cv, block, block_len, counter, flags, out, outblocks);