Make distclean cleaner.

`make distclean` now removes the `sysroot` directory and the contents of the `deps` directory.

Author: wolfmcnally

Makefile.in

@@ -53,3 +53,5 @@ distclean:
 	rm -f configure.scan configure.status config.log
 	rm -f config.log config.status config.h
 	rm -rf libs
+	rm -rf deps/*
+	rm -rf sysroot