* device/lib/pic16/configure, device/lib/pic16/configure.ac:

* device/lib/pic16/configure, device/lib/pic16/configure.ac:
  always use the sdcc from the current build tree (ignore $CC from
  the environment, fixes compile farm builds)
* device/lib/Makefile.in: rename .a into .lib for compatibility,
  remove more build products from install directory
* sdcc/src/pic16/main.c (_pic16_linkEdit,_pic16_finaliseOptions)
* sdcc/support/scripts/sdcc.nsi: revert to .lib extension for libs

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@5222 4a8a32a2-be11-0410-ad9d-d568d2c75423