Fix ninja build for Android

android_ninja build script can't recognize "BUILDTYPE=Release". This
CL parses and sets the BUILDTYPE parameter in android_setup.sh.

BUG=skia:2383
R=epoger@google.com, scroggo@google.com, mtklein@google.com, djsollen@google.com

Author: qiankun.miao@intel.com

Review URL: https://codereview.chromium.org/221283007

git-svn-id: http://skia.googlecode.com/svn/trunk@14043 2bbb7eff-a529-9590-31e7-b0007b416f81

platform_tools/android/bin/android_setup.sh

@@ -19,6 +19,9 @@ while (( "$#" )); do
     fi
     DEVICE_SERIAL="-s $2"
     shift
+  elif [[ $(echo "$1" | grep "^BUILDTYPE=") != "" ]];
+  then
+    BUILDTYPE=${1##BUILDTYPE=}
   else
     APP_ARGS=("${APP_ARGS[@]}" "${1}")
   fi