(CygbuildBootVariablesGlobalMain): CYGBUILD_INSTALL_IGNORE add *MANIFEST*

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
libcheck.sh (CygbuildCygcheckLibraryDepSourcePython): Do not warn about os.rename any longer

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
(CygbuildCmdBuildPython): Use -Wl,--no-undefined

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
Ass support for config.{guess,sub}

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
bin/cygbuild.sh: rm debug