Include zend_portability.h before zend_globals_macros.h

zend_globals_macros.h includes zend_portability.h itself only from PHP
8.4. Against PHP 8.3's headers, the early include that redefines EG() and
CG() for PHP 8.6 thread-safe builds found BEGIN_EXTERN_C(), ZEND_API and
ZTS undefined and broke every 8.3 compile.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013qRnM7saDyd5yKXxJAnR7o

Author: ondrejmirtes

turbo-ext/src/support.h

@@ -29,8 +29,11 @@
  * every gcc/libc target supports — gcc then warns the attribute is ignored */
 #pragma GCC diagnostic ignored "-Wattributes"
 
+/* zend_portability.h first: zend_globals_macros.h includes it itself only
+ * from PHP 8.4, and it brings in the configuration defining ZTS */
 extern "C" {
 #include "php_version.h"
+#include "zend_portability.h"
 #include "zend_globals_macros.h"
 }