Run make in order to properly detect which version of XCode is
installed
Run make install instead of bin.install
Update to latest version which resolves the multiple symlink
layers issue.
Fixed head to use svn. Previous head didn't work (just downloaded
a single html file).
ClosesHomebrew/homebrew#14143.
Signed-off-by: Misty De Meo <mistydemeo@gmail.com>