[wasm] WIP fix arm64 frame alignment.

src/arm64/macro-assembler-arm64.h

Index: src/arm64/macro-assembler-arm64.h
diff --git a/src/arm64/macro-assembler-arm64.h b/src/arm64/macro-assembler-arm64.h
index bb04adcceb665eeaf04d71687ade45a6c5e653cb..4b6b3c0fb1712e823c1db6f58ec4c8bc0c14fb89 100644
--- a/src/arm64/macro-assembler-arm64.h
+++ b/src/arm64/macro-assembler-arm64.h
@@ -788,6 +788,9 @@ class MacroAssembler : public Assembler {
   // If emit_debug_code() is false, this emits no code.
   void AssertStackConsistency();
 
+  // Emits a runtime assert that the CSP is aligned.
+  void AssertCspAligned();
+
   // Preserve the callee-saved registers (as defined by AAPCS64).
   //
   // Higher-numbered registers are pushed before lower-numbered registers, and