[Ubsan] Fix the missing_return.cpp test to pass on FreeBSD

[kcc]

I'd like to remove the difference between OSes, not increase it.
glider@, can we remove the Darwin-specific check here?

[samsonov]

LGTM for now. I'd really like to work on Mac fixes for stacktraces in UBSan later.

[kcc]

LGTM then...

Closed by commit rL221597 (authored by vkutuzov).

test/ubsan/TestCases/Misc/missing_return.cpp

 // RUN: %clangxx -fsanitize=return -g %s -O3 -o %t
 // RUN: not %run %t 2>&1 | FileCheck %s
 // RUN: UBSAN_OPTIONS=print_stacktrace=1 not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-%os-STACKTRACE
 
 // CHECK: missing_return.cpp:[[@LINE+1]]:5: runtime error: execution reached the end of a value-returning function without returning a value
 int f() {
 // Slow stack unwinding is disabled on Darwin for now, see
 // https://code.google.com/p/address-sanitizer/issues/detail?id=137
 // CHECK-Linux-STACKTRACE: #0 {{.*}} in f(){{.*}}missing_return.cpp:[[@LINE-3]]
+// CHECK-FreeBSD-STACKTRACE: #0 {{.*}} in f(void){{.*}}missing_return.cpp:[[@LINE-4]]
 // Check for already checked line to avoid lit error reports.
 // CHECK-Darwin-STACKTRACE: missing_return.cpp
 }
 
 int main(int, char **argv) {
   return f();
 }