Fix testcase for platform without gnu/stubs-x32.h

target maybe_x32 doesn't check if platform has gnu/stubs-x32.h, but
it's included by stdint.h in the testcase.
Adjust testcase: remove stdint.h, use 'typedef long long int64_t'
instead.

gcc/testsuite/ChangeLog:

	PR target/113711
	* gcc.target/i386/apx-ndd-x32-1.c: Adjust testcase.

gcc/testsuite/gcc.target/i386/apx-ndd-x32-1.c

@@ -3,7 +3,7 @@
 /* { dg-require-effective-target maybe_x32 } */
 /* { dg-options "-mapxf -O2 -mx32" } */
 
-#include <stdint.h>
+typedef long long int64_t;
 
 #define FOO(TYPE, OP_NAME, OP, IMM)			\
 TYPE							\