[asan] Fix test on ppc64le-linux by checking "UNKNOWN memory access"

llvm-svn: 300935

compiler-rt/test/asan/TestCases/Posix/strchr.c

@@ -28,7 +28,7 @@ int main(int argc, char **argv) {
     return 1;
   char *r = strchr(s, 'x');
   // CHECK: AddressSanitizer: {{SEGV|BUS}} on unknown address
-  // CHECK: The signal is caused by a READ memory access
+  // CHECK: The signal is caused by a {{READ|UNKNOWN}} memory access
   // CHECK: strchr.c:[[@LINE-3]]
   assert(r == p);