jit: Fix warning reported by gcc-11 caused by dubious function signature.

Reported-By: Erik Rijkers <er@xs4all.nl>
Discussion: https://postgr.es/m/833107370.1313189.1619647621213@webmailclassic.xs4all.nl
Backpatch: 13, where b059d2f4 introduced the issue.

src/backend/jit/llvm/llvmjit_expr.c

@@ -61,7 +61,7 @@ static LLVMValueRef build_EvalXFuncInt(LLVMBuilderRef b, LLVMModuleRef mod,
 									   const char *funcname,
 									   LLVMValueRef v_state,
 									   ExprEvalStep *op,
-									   int natts, LLVMValueRef v_args[]);
+									   int natts, LLVMValueRef *v_args);
 static LLVMValueRef create_LifetimeEnd(LLVMModuleRef mod);
 
 /* macro making it easier to call ExecEval* functions */
@@ -2459,7 +2459,7 @@ BuildV1Call(LLVMJitContext *context, LLVMBuilderRef b,
 static LLVMValueRef
 build_EvalXFuncInt(LLVMBuilderRef b, LLVMModuleRef mod, const char *funcname,
 				   LLVMValueRef v_state, ExprEvalStep *op,
-				   int nargs, LLVMValueRef v_args[])
+				   int nargs, LLVMValueRef *v_args)
 {
 	LLVMValueRef v_fn = llvm_pg_func(mod, funcname);
 	LLVMValueRef *params;