.travis.yml: Build for Mac OS X. (rvthtool only)

travis-ci doesn't have Qt5 for Mac set up (or it's not immediately
obvious how to access it), so let's disable that for now.

.travis.yml

@@ -1,9 +1,14 @@
-language: c
+language: cpp
 
-# Compiler selection.
-compiler:
-  - clang
-  - gcc
+# Build matrix.
+matrix:
+  include:
+    - os: linux
+      dist: trusty
+      sudo: required
+      compiler: gcc
+    - os: osx
+      compiler: clang
 
 # Use Ubuntu 14.04 as the build environment.
 sudo: required

src/CMakeLists.txt

@@ -50,4 +50,8 @@ CONFIGURE_FILE("${CMAKE_CURRENT_SOURCE_DIR}/config.nettle.h.in" "${CMAKE_CURRENT
 ADD_SUBDIRECTORY(libwiicrypto)
 ADD_SUBDIRECTORY(librvth)
 ADD_SUBDIRECTORY(rvthtool)
-ADD_SUBDIRECTORY(qrvthtool)
+
+# TODO: tracis-ci Qt/Mac
+IF(NOT APPLE)
+	ADD_SUBDIRECTORY(qrvthtool)
+ENDIF(NOT APPLE)