Landmine to clobber failing Android x86/x64 builds

Clobber to fix Android x86/x64 builds after
https://codereview.webrtc.org/1414343008/

They started failing with errors like
../../third_party/android_tools/ndk/platforms/android-21/arch-x86_64/usr/include/stdint.h:32:20: fatal error: stddef.h: No such file or directory
   #include <stddef.h>
             ^
from https://build.chromium.org/p/tryserver.webrtc/builders/android_compile_x64_dbg/builds/10032/steps/compile/logs/stdio
A clobbered build solved the problem.

BUG=webrtc:5006
TBR=mbonadei@webrtc.org

Review-Url: https://codereview.webrtc.org/2601473002 .
Cr-Original-Commit-Position: refs/heads/master@{#15757}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 0de11aa130b50d834e08a813138fcbbcc945b273
1 file changed