[ubsan][test] Unsupport Android for new test diag-stacktrace.cpp

https://reviews.llvm.org/D123562#3446485 reported that the test failed
on arm-linux-android.

Author: MaskRay

compiler-rt/test/ubsan/TestCases/Misc/Linux/diag-stacktrace.cpp

@@ -1,5 +1,6 @@
 /// Fast unwinder does not work with Thumb code
 // UNSUPPORTED: thumb
+// UNSUPPORTED: android
 
 // RUN: %clangxx -fsanitize=return %gmlt -O2 -fno-omit-frame-pointer -fasynchronous-unwind-tables %s -o %t
 // RUN: %env_ubsan_opts=print_stacktrace=1:fast_unwind_on_fatal=0 not %run %t 2>&1 | FileCheck %s