buildroot

* Remove bogus tab in libcgi.mk that prevented the library from being build
* Added headerfiles to STAGING_DIR in usr/include/libcgi so that we
  can actually use the library with the toolchain
* Added patch that fixes up the makefile.in and fixes a few bugs in libcgi
* rm the target-dir's so* in libcgi-clean

Most of the patch has been taken from the debian package.

Thanks to Lars Munch.