Merge pull request #500 from benluddy/release-ppc64le-s390x

Produce opm linux release binaries for ppc64le and s390x.

Author: openshift-merge-robot

.github/workflows/release.yaml

@@ -3,6 +3,9 @@ on:
   push:
     tags:
       - 'v[0-9]+.[0-9]+.[0-9]+'
+defaults:
+  run:
+    shell: bash
 jobs:
   create:
     runs-on: ubuntu-latest
@@ -25,7 +28,16 @@ jobs:
           - ubuntu-latest
           - macos-latest
           - windows-latest
+        arch:
+          - amd64
+        include:
+          - os: ubuntu-latest
+            arch: ppc64le
+          - os: ubuntu-latest
+            arch: s390x
     runs-on: ${{ matrix.os }}
+    env:
+      GOARCH: ${{ matrix.arch }}
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-go@v2