[Ada] sigtramp-vxworks: Add a rule for sp (DWARF r31) on AArch64

2018-11-14  Olivier Hainque  <hainque@adacore.com>

gcc/ada/

	* sigtramp-vxworks-target.inc: Fix stack checking test errors in
	ACATS, now that GCC can emit CFI rules referring to sp in
	absence of a frame pointer.

From-SVN: r266134

gcc/ada/ChangeLog

+2018-11-14  Olivier Hainque  <hainque@adacore.com>
+
+	* sigtramp-vxworks-target.inc: Fix stack checking test errors in
+	ACATS, now that GCC can emit CFI rules referring to sp in
+	absence of a frame pointer.
+
 2018-11-14  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* exp_aggr.adb (Check_Static_Components): Remove dead test.

gcc/ada/sigtramp-vxworks-target.inc

@@ -388,6 +388,7 @@ TCR(COMMON_CFI(G_REG_OFFSET(27))) \
 TCR(COMMON_CFI(G_REG_OFFSET(28))) \
 TCR(COMMON_CFI(G_REG_OFFSET(29))) \
 TCR(COMMON_CFI(G_REG_OFFSET(30))) \
+TCR(COMMON_CFI(G_REG_OFFSET(31))) \
 TCR(COMMON_CFI(PC_OFFSET)) \
 TCR(".cfi_return_column " S(REGNO_PC_OFFSET))
 #else