Release v1.4: Update minor version number to 4

Change-Id: I8676a22649dce92d0ddd98013fc6dafcfbe94c90
Signed-off-by: David Cunado <david.cunado@arm.com>

Makefile

@@ -8,7 +8,7 @@
 # Trusted Firmware Version
 #
 VERSION_MAJOR			:= 1
-VERSION_MINOR			:= 3
+VERSION_MINOR			:= 4
 
 # Default goal is build all images
 .DEFAULT_GOAL			:= all