dtc: Bump version to 1.4.2

Bump version in preparation for a new release.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

Makefile

diff --git a/Makefile b/Makefile
index 078ecf6..ee8e3b2 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@
 #
 VERSION = 1
 PATCHLEVEL = 4
-SUBLEVEL = 1
+SUBLEVEL = 2
 EXTRAVERSION =
 LOCAL_VERSION =
 CONFIG_LOCALVERSION =