Travis: pull more commits
Travis: pull more commits

At the moment Travis build fail because git describe fails.

From the patch:

 # Travis by default only pulls the last 50 commits, which means
 # "git describe" will fail once we are more than 50 commits
 # away from the last tag.

rfjakob/earlyoom,rfjakob/earlyoom,rfjakob/earlyoom,rfjakob/earlyoom