Increment Makefile version to 1.2

Change-Id: I50cd383e480628bf750bcfb76cfdc9d597c2595b
diff --git a/Makefile b/Makefile
index b035301..a650cdc 100644
--- a/Makefile
+++ b/Makefile
@@ -32,7 +32,7 @@
 # Trusted Firmware Version
 #
 VERSION_MAJOR			:= 1
-VERSION_MINOR			:= 1
+VERSION_MINOR			:= 2
 
 # Default goal is build all images
 .DEFAULT_GOAL			:= all