Merge changes from topic "build-ndk-crt" am: 934d8bf262

Original change: https://android-review.googlesource.com/c/platform/prebuilts/ndk/+/1363327

Change-Id: I2130803cb0b70b29eda9485b13d26acd595a7a0d
tree: bcf3c9ae6ea7569e1c2c6ebed9d8de4c8f93470e
  1. r21/
  2. Android.bp
  3. Android.mk
  4. CleanSpec.mk
  5. NOTICE
  6. pylintrc
  7. update.py