more tweak for bionic

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

util-linux/swaponoff.c

@@ -25,6 +25,9 @@
 #include "libbb.h"
 #include <mntent.h>
 #include <sys/swap.h>
+#ifndef __BIONIC__
+# include <sys/swap.h>
+#endif
 
 #if ENABLE_FEATURE_MOUNT_LABEL
 # include "volume_id.h"
@@ -32,6 +35,10 @@
 # define resolve_mount_spec(fsname) ((void)0)
 #endif
 
+#ifndef MNTTYPE_SWAP
+# define MNTTYPE_SWAP "swap"
+#endif
+
 #if ENABLE_FEATURE_SWAPON_PRI
 struct globals {
 	int flags;