This port has a typedef redefinition, which are not supported by base GCC.

Remove it to fix build on GCC-based architectures.

PR:		234305
Submitted by:	Piotr Kubaj
Approved by:	portmgr (tier-2 blanket)

devel/pecl-xdebug-devel/files/patch-xdebug__compat.h

@@ -0,0 +1,11 @@
+--- xdebug_compat.h.orig	2018-12-23 17:22:30 UTC
++++ xdebug_compat.h
+@@ -75,8 +75,4 @@ zend_bool xdebug_zend_hash_apply_protection_end(HashTa
+ #  define XDEBUG_ZEND_CONSTANT_MODULE_NUMBER(v) ((v)->module_number)
+ # endif
+ 
+-# if PHP_VERSION_ID < 70300
+-typedef void (*zif_handler)(INTERNAL_FUNCTION_PARAMETERS);
+-# endif
+-
+ #endif