Merge tag 'android-6.0.0_r26' into HEAD

Android 6.0.0 release 26

* tag 'android-6.0.0_r26':

Change-Id: I5df17ad50cb4f06d5883edfc93bf03220ec7a35c
tree: 7a96363a613be083f738ca9eae3eb35d86bee3ae
  1. prebuilt/
  2. Android.mk
  3. CleanSpec.mk
  4. README