[COMMITTED][AArch64] Fix vrbit_1.c test failure

[Wilco Dijkstra]

The vrbit_1 test was missing a flag to disable code sharing.
Committed as obvious.

ChangeLog:
2019-11-20  Wilco Dijkstra  <wdijk...@arm.com>

    testsuite/
        * gcc.target/aarch64/simd/vrbit_1.c: Add -fno-ipa-icf.

--
diff --git a/gcc/testsuite/gcc.target/aarch64/simd/vrbit_1.c 
b/gcc/testsuite/gcc.target/aarch64/simd/vrbit_1.c
index 
ff19558cc6e0645ccd937bff25857cfbdb480714..c4ca4d140731943ba0028db651e45eccec5626f2
 100644
--- a/gcc/testsuite/gcc.target/aarch64/simd/vrbit_1.c
+++ b/gcc/testsuite/gcc.target/aarch64/simd/vrbit_1.c
@@ -1,5 +1,5 @@
 /* { dg-do run } */
-/* { dg-options "-O2 --save-temps -fno-inline" } */
+/* { dg-options "-O2 --save-temps -fno-inline -fno-ipa-icf" } */
 
 #include <arm_neon.h>