Bump version to v1.5.0

We've accumulated several new features as well as a number of bugfixes,
so prepare for another release.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
diff --git a/Makefile b/Makefile
index 8c9e326..e6b32cf 100644
--- a/Makefile
+++ b/Makefile
@@ -9,8 +9,8 @@
 # CONFIG_LOCALVERSION from some future config system.
 #
 VERSION = 1
-PATCHLEVEL = 4
-SUBLEVEL = 7
+PATCHLEVEL = 5
+SUBLEVEL = 0
 EXTRAVERSION =
 LOCAL_VERSION =
 CONFIG_LOCALVERSION =