Added Rust 1.12 builds

Author: Razican

.appveyor.yml

@@ -13,6 +13,12 @@ environment:
     MSYS_BITS: 64
   - TARGET: beta-i686-pc-windows-gnu
     MSYS_BITS: 32
+  - TARGET: 1.12.0-x86_64-pc-windows-msvc
+  - TARGET: 1.12.0-i686-pc-windows-msvc
+  - TARGET: 1.12.0-x86_64-pc-windows-gnu
+    MSYS_BITS: 64
+  - TARGET: 1.12.0-i686-pc-windows-gnu
+    MSYS_BITS: 32
   - TARGET: 1.11.0-x86_64-pc-windows-msvc
   - TARGET: 1.11.0-i686-pc-windows-msvc
   - TARGET: 1.11.0-x86_64-pc-windows-gnu

.travis.yml

@@ -18,6 +18,7 @@ rust:
   - nightly
   - beta
   - stable
+  - 1.12.0
   - 1.11.0
 
 # Load travis-cargo