chmod the analyzer scripts.

I've updated the build script to do this, but this "backports" that
for the NDK. https://android-review.googlesource.com/#/c/281065/

Test: ndk/run_tests.py --filter NDK_ANALYZE
Bug: None
Change-Id: Ibc1760980a51db5e80851380854386d2a2f12d17
32 files changed
tree: 9ef1b868a55adda2d48055b1ca2eb6b5b1386500
  1. clang-2812033/
  2. clang-3289846/