[Ada] Don't define HAVE_ADJUST_CONTEXT_FOR_RAISE on VxWorks7 for AArch64

2018-05-22  Doug Rupp  <rupp@adacore.com>

gcc/ada/

	* init.c (HAVE_ADJUST_CONTEXT_FOR_RAISE): Don't define on VxWorks7 for
	AArch64.

From-SVN: r260534

gcc/ada/ChangeLog

+2018-05-22  Doug Rupp  <rupp@adacore.com>
+
+	* init.c (HAVE_ADJUST_CONTEXT_FOR_RAISE): Don't define on VxWorks7 for
+	AArch64.
+
 2018-05-22  Olivier Hainque  <hainque@adacore.com>
 
 	* libgnat/a-except.adb (Exception_Propagation.Propagate_Exception):

gcc/ada/init.c

@@ -1937,7 +1937,7 @@ __gnat_map_signal (int sig,
   Raise_From_Signal_Handler (exception, msg);
 }
 
-#if defined (ARMEL) && (_WRS_VXWORKS_MAJOR >= 7) || defined (__aarch64__)
+#if defined (ARMEL) && (_WRS_VXWORKS_MAJOR >= 7) && !defined (__aarch64__)
 
 /* ARM-vx7 case with arm unwinding exceptions */
 #define HAVE_GNAT_ADJUST_CONTEXT_FOR_RAISE