.shippable.yml: disable the win cross tests

The pkg.mxe.cc package repositories have been down for the last two
weeks causing the builds to fail when shippable re-builds the
containers.

This is really just a sticking plaster until we can get our own docker
hub images properly setup so we can avoid having dependencies on
external repos.
Signed-off-by: NAlex Bennée <alex.bennee@linaro.org>
Acked-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20181214151718.5041-1-alex.bennee@linaro.org
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

.shippable.yml

@@ -7,10 +7,11 @@ env:
   matrix:
     - IMAGE=debian-amd64
       TARGET_LIST=x86_64-softmmu,x86_64-linux-user
-    - IMAGE=debian-win32-cross
-      TARGET_LIST=arm-softmmu,i386-softmmu,lm32-softmmu
-    - IMAGE=debian-win64-cross
-      TARGET_LIST=aarch64-softmmu,sparc64-softmmu,x86_64-softmmu
+    # currently disabled as the mxe.cc repos are down
+    # - IMAGE=debian-win32-cross
+    #   TARGET_LIST=arm-softmmu,i386-softmmu,lm32-softmmu
+    # - IMAGE=debian-win64-cross
+    #   TARGET_LIST=aarch64-softmmu,sparc64-softmmu,x86_64-softmmu
     - IMAGE=debian-armel-cross
       TARGET_LIST=arm-softmmu,arm-linux-user,armeb-linux-user
     - IMAGE=debian-armhf-cross