added stable to test matrix, arm build deps

Author: ryankurte

.travis.yml

@@ -1,14 +1,38 @@
 language: rust
 
+
+
 matrix:
   include:
     - env: TARGET=armv7-unknown-linux-gnueabihf
       rust: nightly
       if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
+      addons:
+        apt:
+          packages:
+            - libc6-armhf-cross
+            - libc6-dev-armhf-cross
+            - gcc-arm-linux-gnueabihf
 
     - env: TARGET=x86_64-unknown-linux-gnu
       rust: nightly
       if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
+    
+    - env: TARGET=armv7-unknown-linux-gnueabihf
+      rust: stable
+      if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
+      addons:
+        apt:
+          packages:
+            - libc6-armhf-cross
+            - libc6-dev-armhf-cross
+            - gcc-arm-linux-gnueabihf
+
+
+    - env: TARGET=x86_64-unknown-linux-gnu
+      rust: stable
+      if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
+
 
 before_install:
   - set -e