Kickoff 2017.05 cycle

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

Makefile

@@ -86,7 +86,7 @@ else # umask / $(CURDIR) / $(O)
 all:
 
 # Set and export the version string
-export BR2_VERSION := 2017.02
+export BR2_VERSION := 2017.05-git
 # Actual time the release is cut (for reproducible builds)
 BR2_VERSION_EPOCH = 1488315000