makefile: incrementing minor version to reflect v2.5 release

Updated the minor version in the makefile

Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: I5dcaaa37979898e7b758e1a239a2552b931a7008
diff --git a/Makefile b/Makefile
index a758b8a..8eba940 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@
 
 # TFTF Version
 VERSION_MAJOR		:= 2
-VERSION_MINOR		:= 4
+VERSION_MINOR		:= 5
 
 MAKE_HELPERS_DIRECTORY := make_helpers/
 include ${MAKE_HELPERS_DIRECTORY}build_macros.mk