Adding mipsel-linux-android- cross toolchain

Copied directly from 20120416 internal built of NDK toolchain at
$NDK/toolchains/mipsel-linux-android-4.4.3/prebuilt/darwin-x86
Please see $NDK/docs/DEVELOPMENT.html for how NDK toolchain is built.

Verified to build correct MIPS image from source at
repo init -u ssh://mipsia.review.mips.com:29418/platform/manifest.git -b wip-mips-ics-mr1

Change-Id: I65b0fe8fb4bccf80649ae1451bf5fa61befbc84a