Fix "build: display the full path of the installed libs, to allow copy paste"

When OUT_DIR is not "out", it'll show the wrong path, as the out dir
won't be under ANDROID_BUILD_TOP

This fixes commit 80970297312c426f326284e81869db8a2cf8a487.

Change-Id: Ie8610ec5e1e4ae570a64fba9168a686bfe929961
unpackbootimg: add a target specifically for unpackbootimg.
for some reason, and I am guessing this is a bug in the Android build, I can no longer run the following:
make -j32 out/host/darwin-x86/bin/unpackbootimg

It works if the build has been built, but not if it is clean. Somewhere within the bowels of AOSP
something broken in 4.1.2.

Change-Id: I4f8c434f3fce9ddaee4f54febba02efac07a31a3
Fix SmokeTest

Change-Id: Ia53766b62d3777de49eaaac122042b99e6f1a3f7