Makefile: kickoff 2013.02 cycle

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

Makefile

@@ -24,7 +24,7 @@
 #--------------------------------------------------------------
 
 # Set and export the version string
-export BR2_VERSION:=2012.11
+export BR2_VERSION:=2013.02
 
 # Check for minimal make version (note: this check will break at make 10.x)
 MIN_MAKE_VERSION=3.81