Libc update to simplify merge.

Bumping libc files for unsupported architectures, to simplify merging.
A bunch of small fixes:
 * in libutil update
 * the macro in endian.h
 * some undefined types due to clear separation from host.
 * Fix a warning for cdbr.c

Some modification which were required for the new build system:
 * inclusion path for const.h in sconst, still hacky
 * Removed default malloc.c which conflicts on some occasions.

lib/libmthread/global.h

@@ -5,6 +5,9 @@
 #endif
 
 #include <assert.h>
+#include <sys/types.h>
+#include <sys/signal.h>
+
 
 #define NO_THREADS 4 
 #define MAX_THREAD_POOL 1024