[travis] deeper git clone, allows re-running earlier commits

nyalldawson · nyalldawson · commit 7ac522255653 · 2015-09-10T16:13:29.000+10:00
when dash submission fails
diff --git a/.travis.yml b/.travis.yml
@@ -8,7 +8,7 @@ compiler:
   - clang
 
 git:
-  depth: 1
+  depth: 30
 
 cache: apt
 
