[arm64] Fix undefined symbol linker error

Assembler::CheckBuffer() was defined inline in a header file but without
inline linkage, causing an undefined symbol link error on arm64 macOS.

Fixes: https://github.com/nodejs/node-v8/issues/233
Bug: v8:13055
Change-Id: Ifb638705e95de72b2e8d472e7092e88d77cf8ba8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3749583
Auto-Submit: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81749}

src/codegen/arm64/assembler-arm64-inl.h

@@ -1066,21 +1066,6 @@ const Register& Assembler::AppropriateZeroRegFor(const CPURegister& reg) const {
   return reg.Is64Bits() ? xzr : wzr;
 }
 
-inline void Assembler::CheckBufferSpace() {
-  DCHECK_LT(pc_, buffer_start_ + buffer_->size());
-  if (V8_UNLIKELY(buffer_space() < kGap)) {
-    GrowBuffer();
-  }
-}
-
-V8_INLINE void Assembler::CheckBuffer() {
-  CheckBufferSpace();
-  if (pc_offset() >= next_veneer_pool_check_) {
-    CheckVeneerPool(false, true);
-  }
-  constpool_.MaybeCheck();
-}
-
 EnsureSpace::EnsureSpace(Assembler* assembler) : block_pools_scope_(assembler) {
   assembler->CheckBufferSpace();
 }

src/codegen/arm64/assembler-arm64.h

@@ -2637,8 +2637,21 @@ class V8_EXPORT_PRIVATE Assembler : public AssemblerBase {
   }
 
   void GrowBuffer();
-  V8_INLINE void CheckBufferSpace();
-  void CheckBuffer();
+
+  void CheckBufferSpace() {
+    DCHECK_LT(pc_, buffer_start_ + buffer_->size());
+    if (V8_UNLIKELY(buffer_space() < kGap)) {
+      GrowBuffer();
+    }
+  }
+
+  void CheckBuffer() {
+    CheckBufferSpace();
+    if (pc_offset() >= next_veneer_pool_check_) {
+      CheckVeneerPool(false, true);
+    }
+    constpool_.MaybeCheck();
+  }
 
   // Emission of the veneer pools may be blocked in some code sequences.
   int veneer_pool_blocked_nesting_;  // Block emission if this is not zero.