Merge pull request #103 from pah/travis/32bit

.travis.yml: enable 32-bit builds

.travis.yml

@@ -6,18 +6,19 @@ compiler:
 
 env:
   matrix:
-    - CONF=debug
-    - CONF=release
+    - CONF=debug   BITS=64
+    - CONF=release BITS=64
+    - CONF=debug   BITS=32
+    - CONF=release BITS=32
   global:
     - GITHUB_REPO='miloyip/rapidjson'
-    # prepare for 32/64 bit multi-arch support
-    - BITS=64
     - secure: "HrsaCb+N66EG1HR+LWH1u51SjaJyRwJEDzqJGYMB7LJ/bfqb9mWKF1fLvZGk46W5t7TVaXRDD5KHFx9DPWvKn4gRUVkwTHEy262ah5ORh8M6n/6VVVajeV/AYt2C0sswdkDBDO4Xq+xy5gdw3G8s1A4Inbm73pUh+6vx+7ltBbk="
 
 before_install:
   - sudo add-apt-repository -y ppa:codegear/release
   - sudo apt-get update -qq
-  - sudo apt-get install -y premake4 valgrind
+  - sudo apt-get install -qq premake4 valgrind
+  - if [ "$BITS" = 32 ]; then sudo apt-get install -qq g++-multilib libc6-dbg:i386; fi
 
 install: true