distcheck: Need to package .version on Ubuntu as well

echo 0.0.6.14-5dff > ../../.version-t && mv ../../.version-t ../../.version
/bin/bash: ../../.version-t: Permission denied
Makefile:786: recipe for target '../../.version' failed
make[1]: *** [../../.version] Error 1

Change-Id: I726181f7af3e7582398738e0746982a5ea31d7e9
diff --git a/Makefile.am b/Makefile.am
index 7c9c65b..196e784 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -3,7 +3,7 @@
 SUBDIRS = include src contrib
 
 BUILT_SOURCES = $(top_srcdir)/.version
-EXTRA_DIST = git-version-gen
+EXTRA_DIST = git-version-gen .version
 $(top_srcdir)/.version:
 	echo $(VERSION) > $@-t && mv $@-t $@
 dist-hook: