[PATCH modular] Remove "lib only" option from build.sh.

[zt.tmzt at gmail.com]

While I only recently discovered the -l option to build.sh, I find it
immensly helpful in building a set of protos and libraries for various
architectures/processors in a build root.  The alternative is near
verbose a setup as building and installing every library and proto
from git manually, which is what I was doing prior to discovering this
option.

On a more general note, this makes it more difficult for someone to
begin working with the X codebase, as they may be focused on a single
driver or the xserver/DDXs themselves, building able to install all of
the prerequesites in one go is of great utility.

My use case:

I am building X for an arm processor, including all of the libraries
it requires in a static configuration in a tree under /opt


--
tmzt