- Fixed missing variable interpolation because of single quotes
- Replaced /bin/sh in gen_uEnv.txt.sh with /usr/bin/env bash as the default
echo doesn't support '-n'
- Fixed some whitespace errors
- A succesful build requires for now to skip the gold linker on OSX.
Change-Id: Id09bf52f45252026e3a58b74e8448ea24a0dab12