appveyor.yml: Move cygwin and mingw up the list

They are the 'weird' platforms, so we want them to be run first.
That way we don't have to wait for all the other tests before finding
out that something broke.

.appveyor.yml

@@ -4,6 +4,10 @@ os: Visual Studio 2015
 
 environment:
   matrix:
+    - arch: x86
+      compiler: msys2-mingw
+      backend: ninja
+
     - arch: x86
       compiler: msvc2010
       backend: ninja
@@ -20,7 +24,11 @@ environment:
       compiler: msvc2015
       backend: vs2015
 
-    - arch: x86
+    - arch: x64
+      compiler: cygwin
+      backend: ninja
+
+    - arch: x64
       compiler: msys2-mingw
       backend: ninja
 
@@ -34,14 +42,6 @@ environment:
       backend: vs2017
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
 
-    - arch: x64
-      compiler: msys2-mingw
-      backend: ninja
-
-    - arch: x64
-      compiler: cygwin
-      backend: ninja
-
 platform:
   - x64