Cosmetic changes to arm64-android-clang.cmake

Change-Id: I69a8f433d8a8fbc3cfd7242a830341b5a1e34401
diff --git a/build/cmake/toolchains/arm64-android-clang.cmake b/build/cmake/toolchains/arm64-android-clang.cmake
index 5e20baf..fc728e6 100644
--- a/build/cmake/toolchains/arm64-android-clang.cmake
+++ b/build/cmake/toolchains/arm64-android-clang.cmake
@@ -23,9 +23,9 @@
 
 set(AS_EXECUTABLE as)
 
-# Toolchain file doesn't have access to cached variables:
+# Toolchain files don't have access to cached variables:
 # https://gitlab.kitware.com/cmake/cmake/issues/16170. Set an intermediate
-# environment variable when loaded first time.
+# environment variable when loaded the first time.
 if(AOM_ANDROID_NDK_PATH)
   set(ENV{_AOM_ANDROID_NDK_PATH} "${AOM_ANDROID_NDK_PATH}")
 else()