(CygbuildInstallExtraChmodBin): Treat *.dll 755

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
libcheck.sh: (CygbuildCygcheckLibraryDepSourceCpp): No getopt check

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
(CygbuildConfCC): Correct log output

Signed-off-by: Jari Aalto <jari.aalto@cante.net>