[GFS2] Hook GFS2 into the Kbuild system

Adds GFS2 into fs/Kconfig and adds a Makefile entry

Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/Makefile b/fs/Makefile
index 1db7113..0922727 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -103,3 +103,4 @@
 obj-$(CONFIG_DEBUG_FS)		+= debugfs/
 obj-$(CONFIG_CONFIGFS_FS)	+= configfs/
 obj-$(CONFIG_OCFS2_FS)		+= ocfs2/
+obj-$(CONFIG_GFS2_FS)           += gfs2/