Autotools: Fix stack direction check (#15528)

On Solaris 10 and GCC 4.9 check failed with error in config.log:
error: missing binary operator before token "("

The __has_builtin must be checked in its own `#ifdef/defined` line
above the `#if __has_builtin(....` usage.

Author: petk

Zend/Zend.m4

@@ -223,11 +223,17 @@ AC_DEFUN([ZEND_CHECK_STACK_DIRECTION],
   [AC_RUN_IFELSE([AC_LANG_SOURCE([dnl
 #include <stdint.h>
 
+#ifdef __has_builtin
+# if __has_builtin(__builtin_frame_address)
+#  define builtin_frame_address __builtin_frame_address(0)
+# endif
+#endif
+
 int (*volatile f)(uintptr_t);
 
 int stack_grows_downwards(uintptr_t arg) {
-#if defined(__has_builtin) && __has_builtin(__builtin_frame_address)
-  uintptr_t addr = (uintptr_t)__builtin_frame_address(0);
+#ifdef builtin_frame_address
+  uintptr_t addr = (uintptr_t)builtin_frame_address;
 #else
   int local;
   uintptr_t addr = (uintptr_t)&local;
@@ -237,8 +243,8 @@ int stack_grows_downwards(uintptr_t arg) {
 }
 
 int main(void) {
-#if defined(__has_builtin) && __has_builtin(__builtin_frame_address)
-  uintptr_t addr = (uintptr_t)__builtin_frame_address(0);
+#ifdef builtin_frame_address
+  uintptr_t addr = (uintptr_t)builtin_frame_address;
 #else
   int local;
   uintptr_t addr = (uintptr_t)&local;