commit 99cd7657935b002ad1592b165259a64a4abce4a3
author James Zern <jzern@google.com> Fri Jun 28 16:24:35 2019 -0700
committer James Zern <jzern@google.com> Mon Jul 01 18:32:53 2019 +0000
tree 71623e1f015c98cb2391f55d477b60a905e7da30
parent 6ba186f221ec350d4f6f2f26dc7ffc548d0eeb5d

arm64-android-clang.cmake: correct default ANDROID_PLATFORM

21 -> android-21; this fixes failures with ndk's < r19:
android-ndk-r16/build/cmake/android.toolchain.cmake:438 (message):
  Invalid Android platform: 21.

this should be compatible as later versions (and the ndk docs) use
android-* to designate the platform

Change-Id: I2262af4d5eb2575a99200b541f90ecea0a3c0a0d

build/cmake/toolchains/arm64-android-clang.cmake

diff --git a/build/cmake/toolchains/arm64-android-clang.cmake b/build/cmake/toolchains/arm64-android-clang.cmake
index fc728e6..9b23c84 100644
--- a/build/cmake/toolchains/arm64-android-clang.cmake
+++ b/build/cmake/toolchains/arm64-android-clang.cmake
@@ -14,7 +14,7 @@
 set(AOM_BUILD_CMAKE_TOOLCHAINS_ARM64_ANDROID_CLANG_CMAKE_ 1)
 
 if(NOT ANDROID_PLATFORM)
-  set(ANDROID_PLATFORM 21)
+  set(ANDROID_PLATFORM android-21)
 endif()
 
 if(NOT ANDROID_ABI)