[asan] Mark the strstr test as UNSUPPORTED on FreeBSD

Like Android, FreeBSDs libc calls memchr which causes this test to fail.

Reviewed By: emaste

Differential Revision: https://reviews.llvm.org/D84541

compiler-rt/test/asan/TestCases/strstr_strict.c

@@ -3,8 +3,8 @@
 
 // Newer versions of Android's strstr() uses memchr() internally, which actually
 // does trigger a heap-buffer-overflow (as it tries to find the
-// null-terminator).
-// UNSUPPORTED: android
+// null-terminator). The same applies to FreeBSD.
+// UNSUPPORTED: android, freebsd
 // RUN: %env_asan_opts=strict_string_checks=false %run %t 2>&1
 
 // RUN: %env_asan_opts=strict_string_checks=true not %run %t 2>&1 | FileCheck %s