Merge C/C++ build steps on Travis
diff --git a/.travis.yml b/.travis.yml
index 7d86345..11adf04 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,15 +11,12 @@
     - COVERALLS_PARALLEL=true
   matrix:
     - CONFIG=opt TEST=sanity
-    - CONFIG=dbg TEST=c
-    - CONFIG=dbg TEST=c++
-    - CONFIG=opt TEST=c
-    - CONFIG=opt TEST=c++
+    - CONFIG=dbg TEST="c c++"
+    - CONFIG=opt TEST="c c++"
     - CONFIG=opt TEST=node
     - CONFIG=opt TEST=ruby
     - CONFIG=opt TEST=python
-    - CONFIG=gcov TEST=c
-    - CONFIG=gcov TEST=c++
+    - CONFIG=gcov TEST="c c++"
     - USE_GCC=4.4 CONFIG=opt TEST=build
     - USE_GCC=4.5 CONFIG=opt TEST=build
 script: