Use exact mask when calling umask(2)

Due to the previous negation the high bits of the mask were set, which
at least some versions of the Android build system prevent with a compile-time
check.

src/libcharon/plugins/ha/ha_ctl.c

@@ -121,7 +121,7 @@ ha_ctl_t *ha_ctl_create(ha_segments_t *segments, ha_cache_t *cache)
 
 	if (access(HA_FIFO, R_OK|W_OK) != 0)
 	{
-		old = umask(~(S_IRWXU | S_IRWXG));
+		old = umask(S_IRWXO);
 		if (mkfifo(HA_FIFO, S_IRUSR | S_IWUSR) != 0)
 		{
 			DBG1(DBG_CFG, "creating HA FIFO %s failed: %s",