Bump timeout to 45

Some erlang builds were taking longer than 30 to complete

.travis.yml

@@ -14,7 +14,7 @@ env:
 
 script:
   - ./kerl update releases
-  - travis_wait 30 ./kerl build "$_KERL_VSN" "$_KERL_VSN"
+  - travis_wait 45 ./kerl build "$_KERL_VSN" "$_KERL_VSN"
   - ./kerl install "$_KERL_VSN" "install_$_KERL_VSN"
   - ./kerl status
   - source $(./kerl path install_$_KERL_VSN)/activate