gyps! and builds!

gyps! and builds!

issues:
* silly linux-only binaries in:
+ ndk
+ sdk
* host binaries think they're built for linux
* gyp adds linux-specific linker flags (--begin-group, --end-group)

(host compiler is clang on os x with current xcode versions, so some minor flag tweaks are necessary)

#export ANDROID_NDK_ROOT=/Users/thakis/Downloads/android-ndk-r9b
# Make sure you have sdk 19:
#export ANDROID_SDK_ROOT=/Users/thakis/Documents/android-sdk-macosx
# also `ln -s android-4.3 19.0.0` in $ANDROID_SDK_ROOT/build-tools`

# copy over the two gyp files in third_party/..../ndk
. build/android/envsetup.sh
#GYP_GENERATORS=ninja-android android_gyp  -Goutput_dir=out_android

AR=/Users/thakis/Downloads/android-ndk-r9b/toolchains/arm-linux-androideabi-4.8/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-ar \
GYP_DEFINES="OS=android enable_webrtc=0 fastbuild=1 disable_nacl=1 disable_pnacl=1 dcheck_always_on=1" \
build/gyp_chromium -Goutput_dir=out_android  \
-Dandroid_ndk_root=/Users/thakis/Downloads/android-ndk-r9b \
-Dandroid_sdk_root=/Users/thakis/Documents/android-sdk-macosx
BUG=277641
needs https://codereview.chromium.org/208113002