DELETE: adding menuselect
pjproject: Fix dependencies for parallel make.

From: Shaun Ruffell <sruffell@digium.com>

Many of the test targets in pjlib didn't specify the library under test as a
dependency. This would result in breakage when using parallel make jobs.
res_asterisk_rtp: Build pjproject in parallel again.

From: Shaun Ruffell <sruffell@digium.com>

Now that pjproject itself is fixed up, we can drop the -j1 from the make target
and allow the submakes to use the jobserver.
Makefile: Add "tags" and "cscope" targets.

When in the Asterisk directly a developer can now run:

  $ make tags cscope

to create both a local tags file and the cscope database. You can
also create either independently. I find that cscope is useful for
some tasks but that ctags does a better job of locating definitions
that have preprocessor macros.  Therefore, they are both useful to
have when browsing through the source code.

Signed-off-by: Shaun Ruffell <sruffell@digium.com>