S390X Support (#274)

* support for s390x

* added z15 T01, T02 model checking

* removed z15 checking

* removed empty strings

* added s390x unit tests

* added reference url for hwcaps

* moved documentation to S390XFeatures struct, updated copyright date, removed unused include statement

* changed num_processors to int

* removed newlines from test inputs

* scripts: Add bootlin s390x support

* cmake(ci): Add s390x support

* ci: Add s390x workflow

Co-authored-by: Marcos <marcos.araque.fiallos@ibm.com>
Co-authored-by: Corentin Le Molgat <corentinl@google.com>

.github/workflows/s390x_linux_cmake.yml

@@ -0,0 +1,27 @@
+name: s390x Linux CMake
+
+on:
+  push:
+  pull_request:
+  schedule:
+    # min hours day(month) month day(week)
+    - cron: '0 0 7,22 * *'
+
+jobs:
+  # Building using the github runner environement directly.
+  make:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        targets: [
+          [s390x],
+        ]
+      fail-fast: false
+    env:
+      TARGET: ${{ matrix.targets[0] }}
+    steps:
+    - uses: actions/checkout@v2
+    - name: Build
+      run: make --directory=cmake/ci ${TARGET}_build
+    - name: Test
+      run: make --directory=cmake/ci ${TARGET}_test