patch 8.0.0249: CI failure when a submit is close to previous one

Problem:    When two submits happen quick after each other, the tests for the
            first one may error out.
Solution:   Use a git depth of 10 instead of 1. (Christian Brabandt)

.travis.yml

@@ -25,7 +25,7 @@ env:
 sudo: false
 
 git:
-  depth: 1
+  depth: 10
 
 # instead of a 2*2*8 matrix (2*os + 2*compiler + 8*env),
 # exclude some builds on mac os x and linux

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    249,
 /**/
     248,
 /**/