Adding build jobs for Fedora 31

Change-Id: I5fa1c0366ae996c9dbc11aa1a6068c1f45408a2b
diff --git a/zuul.yaml b/zuul.yaml
index c379bf2..2660f2a 100644
--- a/zuul.yaml
+++ b/zuul.yaml
@@ -124,3 +124,82 @@
         - name: w
           label: f29
     timeout: 120
+
+- job:
+    name: run-ci-build-sh-f31
+    description: |
+      Run project's ./ci/build.sh script.
+    run: playbooks/run-test-command/run.yaml
+    vars:
+      test_command: "ci/build.sh"
+      perform_extra_work: false
+    nodeset:
+      nodes:
+        - name: w
+          label: f31
+    timeout: 900
+
+- job:
+    name: f31-gcc
+    description: |
+      Build on Fedora 31 with GCC.
+    parent: run-ci-build-sh-f31
+    vars:
+      perform_extra_work: true
+
+- job:
+    name: f31-gcc-cover
+    description: |
+      Build on Fedora 31 with GCC and code coverage.
+    parent: f31-gcc
+    post-run: playbooks/coverage-diff/upload-one-report.yaml
+    provides: coverage-f31-gcc-new
+    vars:
+      coverage_xml_dir: "{{ ansible_user_dir }}/build"
+
+- job:
+    name: f31-gcc-cover-previous
+    description: |
+      Build previous version of sources on Fedora 31 with GCC and code coverage.
+    parent: f31-gcc-cover
+    pre-run: playbooks/coverage-diff/checkout-previous.yaml
+    provides: coverage-f31-gcc-old
+    voting: false
+    vars:
+      coverage_xml_dir: "{{ ansible_user_dir }}/build"
+
+- job:
+    name: f31-gcc-asan
+    description: |
+      Build on Fedora 31 with GCC and ASAN sanitizer.
+    parent: run-ci-build-sh
+
+- job:
+    name: f31-gcc-asan-ubsan
+    description: |
+      Build on Fedora 31 with GCC and ASAN+UBSAN sanitizers.
+    parent: run-ci-build-sh
+
+- job:
+    name: f31-clang
+    description: |
+      Build on Fedora 31 with clang.
+    parent: run-ci-build-sh
+
+- job:
+    name: f31-clang-asan
+    description: |
+      Build on Fedora 31 with clang and ASAN sanitizer.
+    parent: run-ci-build-sh
+
+- job:
+    name: f31-clang-asan-ubsan
+    description: |
+      Build on Fedora 31 with clang and ASAN+UBSAN sanitizers.
+    parent: run-ci-build-sh
+
+- job:
+    name: f31-clang-tsan
+    description: |
+      Build on Fedora 31 with clang and TSAN thread sanitizer.
+    parent: run-ci-build-sh