- convert the 'uninstall' target to use separate targets to process each

- convert the 'uninstall' target to use separate targets to process each
  subdirectory instead of a for loop
- remove the FORCE target from the main Makefile and add the couple places
  I used it to the .PHONY target.  .PHONY does the same thing and is a built-in
  more efficient way of doing it.
- add a bunch more targets to .PHONY ...

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@35503 65c4cc65-6c06-0410-ace0-fbb531ad65f3