Fix comment

Author: hoodmane

clang/include/clang/Basic/BuiltinsWebAssembly.def

@@ -199,7 +199,7 @@ TARGET_BUILTIN(__builtin_wasm_ref_is_null_extern, "ii", "nct", "reference-types"
 // return type.
 TARGET_BUILTIN(__builtin_wasm_ref_null_func, "i", "nct", "reference-types")
 
-// Check if the static type of a function pointer matches its static type. Used
+// Check if the runtime type of a function pointer matches its static type. Used
 // to avoid "function signature mismatch" traps. Takes a function pointer, uses
 // table.get to look up the pointer in __indirect_function_table and then
 // ref.test to test the type.