Add kernel namespace exception for mbstat

create-kernel-namespace.sh

@@ -102,6 +102,7 @@ objdump --syms `for i in build/*rtems* ; do find $i/freebsd/sys/ -name '*.o' ; e
 	| sed '/^max_linkhdr$/d' \
 	| sed '/^max_protohdr$/d' \
 	| sed '/^maxsockets$/d' \
+	| sed '/^mbstat$/d' \
 	| sed '/^nd6_debug$/d' \
 	| sed '/^nd6_delay$/d' \
 	| sed '/^nd6_gctimer$/d' \

rtemsbsd/include/machine/rtems-bsd-kernel-namespace.h

@@ -1877,7 +1877,6 @@
 #define	mb_free_ext _bsd_mb_free_ext
 #define	M_BPF _bsd_M_BPF
 #define	M_BPFJIT _bsd_M_BPFJIT
-#define	mbstat _bsd_mbstat
 #define	M_CAMSIM _bsd_M_CAMSIM
 #define	m_cat _bsd_m_cat
 #define	m_collapse _bsd_m_collapse