Increased caching timeout in travis

.travis.yml

@@ -11,7 +11,7 @@ language: cpp
 
 # Enable caching
 cache:
-  timeout: 600
+  timeout: 1000
   directories:
   - build
   - travis/mtime_cache

travis/generate_travis.py

@@ -44,7 +44,7 @@ if __name__ == "__main__":
     s += "\n"
     s += "# Enable caching\n"
     s += "cache:\n"
-    s += "  timeout: 600\n"
+    s += "  timeout: 1000\n"
     s += "  directories:\n"
     s += "  - build\n"
     s += "  - travis/mtime_cache\n"