Update to Golang 1.12, and prepare for ppc64le

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

.appveyor.yml

@@ -12,7 +12,7 @@ environment:
   GOPATH: C:\gopath
   CGO_ENABLED: 1
   matrix:
-    - GO_VERSION: 1.12.1
+    - GO_VERSION: 1.12.5
 
 before_build:
   - choco install -y mingw --version 5.3.0

.travis.yml

@@ -7,7 +7,16 @@ services:
 language: go
 
 go:
-  - "1.11.x"
+  - "1.12.x"
+os:
+  - "linux"
+  # TODO ppc64le is currently timing out on travis; see https://github.com/containerd/containerd/pull/2896
+  # - "linux-ppc64le"
+
+matrix:
+  include:
+    - os: "linux"
+      env: TRAVIS_GOOS=darwin TRAVIS_CGO_ENABLED=0
 
 go_import_path: github.com/containerd/containerd
 
@@ -31,7 +40,6 @@ env:
   - TRAVIS_GOOS=linux TEST_RUNTIME=io.containerd.runc.v1 TRAVIS_CGO_ENABLED=1
   - TRAVIS_GOOS=linux TEST_RUNTIME=io.containerd.runc.v2 TRAVIS_CGO_ENABLED=1
   - TRAVIS_GOOS=linux TEST_RUNTIME=io.containerd.runtime.v1.linux TRAVIS_CGO_ENABLED=1
-  - TRAVIS_GOOS=darwin TRAVIS_CGO_ENABLED=0
 
 before_install:
   - uname -r
@@ -68,14 +76,14 @@ script:
   - if [ "$GOOS" = "linux" ]; then make check-protos check-api-descriptors; fi
   - make build
   - make binaries
-  - if [ "$GOOS" = "linux" ]; then sudo make install ; fi
-  - if [ "$GOOS" = "linux" ]; then make coverage ; fi
-  - if [ "$GOOS" = "linux" ]; then sudo PATH=$PATH GOPATH=$GOPATH make root-coverage ; fi
-  - if [ "$GOOS" = "linux" ]; then sudo PATH=$PATH GOPATH=$GOPATH make integration ; fi
+  - if [ "$TRAVIS_GOOS" = "linux" ]; then sudo make install ; fi
+  - if [ "$TRAVIS_GOOS" = "linux" ]; then make coverage ; fi
+  - if [ "$TRAVIS_GOOS" = "linux" ]; then sudo PATH=$PATH GOPATH=$GOPATH make root-coverage ; fi
+  - if [ "$TRAVIS_GOOS" = "linux" ]; then sudo PATH=$PATH GOPATH=$GOPATH make integration ; fi
   # Run the integration suite a second time. See discussion in github.com/containerd/containerd/pull/1759
-  - if [ "$GOOS" = "linux" ]; then sudo PATH=$PATH GOPATH=$GOPATH TESTFLAGS_PARALLEL=1 make integration ; fi
+  - if [ "$TRAVIS_GOOS" = "linux" ]; then sudo PATH=$PATH GOPATH=$GOPATH TESTFLAGS_PARALLEL=1 make integration ; fi
   - |
-    if [ "$GOOS" = "linux" ]; then
+    if [ "$TRAVIS_GOOS" = "linux" ]; then
       sudo mkdir -p /etc/containerd
       sudo bash -c "cat > /etc/containerd/config.toml <<EOF
       [plugins.cri.containerd.default_runtime]