try to get travis install newer g++

mks-m · mks-m · commit 81a048412cd2 · 2016-02-19T11:16:50.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,3 +1,8 @@
+language: cpp
+compiler:
+  - g++
+  - clang
+
 sudo: false
 env:
   - JIT_OPTS='--opt=jit' TARGET_OPTS='target.py'
