Make sure the temporary version number comes before 3.2.

This way, upgrades from the temporary ones to the final release
will happen automatically.

Signed-off-by: Galen Charlton <gmcharlt@gmail.com>

debian/build-git-snapshot

@@ -30,7 +30,7 @@ latest_sha1() {
 }
 
 newversion() {
-    printf '3.2.git%s.%s' $(date +%Y%m%d%H%M%S) $(latest_sha1)
+    printf '3.2~git%s.%s' $(date +%Y%m%d%H%M%S) $(latest_sha1)
 }
 
 adjust_debian_changelog() {