Azure: Publish code coverage results

* Add an Azure Publish Code Coverage Results task
* Add `make gcovr-html` to generate a gcovr test coverage report in HTML
* Add `make gcovr-xml` to generate a gcovr test coverage report in XML
* Remove `test` target dependency from `make lcov-html`;
  Run the two targets together instead: `make test lcov-html`.

Re: https://github.com/php/php-src/pull/4739#issuecomment-534911441

See: https://externals.io/message/107113,
https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/test/publish-code-coverage-results?view=azure-devops,
and https://github.com/php/php-src/pull/4759.

azure/coverage_job.yml

@@ -0,0 +1,42 @@
+parameters:
+  configurationName: ''
+  configurationParameters: ''
+  runTestsParameters: ''
+  timeoutInMinutes: 60
+
+jobs:
+  - job: ${{ parameters.configurationName }}
+    timeoutInMinutes: ${{ parameters.timeoutInMinutes }}
+    pool:
+      vmImage: 'ubuntu-latest'
+    steps:
+    - template: apt.yml
+    - script: |
+        sudo -H pip install gcovr
+      displayName: 'Install gcovr'
+    - template: configure.yml
+      parameters:
+        configurationParameters: --enable-gcov ${{ parameters.configurationParameters }}
+    - script: make -j$(/usr/bin/nproc) >/dev/null
+      displayName: 'Make Build'
+    - template: install.yml
+    - script: |
+        mysql -uroot -proot -e "CREATE DATABASE IF NOT EXISTS test"
+        sudo -u postgres psql -c "ALTER USER postgres PASSWORD 'postgres';"
+        sudo -u postgres psql -c "CREATE DATABASE test;"
+      displayName: 'Setup'
+    - template: test.yml
+      parameters:
+        configurationName: ${{ parameters.configurationName }}
+        runTestsParameters: ${{ parameters.runTestsParameters }}
+    - script: |
+        make gcovr-xml
+        mv gcovr.xml coverage.xml
+      displayName: 'Generate ${{ parameters.configurationName }} Test Coverage'
+      condition: or(succeeded(), failed())
+    - task: PublishCodeCoverageResults@1
+      inputs:
+        codeCoverageTool: 'Cobertura'
+        summaryFileLocation: coverage.xml
+      displayName: 'Publish ${{ parameters.configurationName }} Test Coverage'
+      condition: or(succeeded(), failed())

azure/install.yml

@@ -0,0 +1,10 @@
+steps:
+  - script: |
+      sudo make install
+      sudo mkdir     /etc/php.d
+      sudo chmod 777 /etc/php.d
+      echo mysqli.default_socket=/var/run/mysqld/mysqld.sock    > /etc/php.d/mysqli.ini
+      echo pdo_mysql.default_socket=/var/run/mysqld/mysqld.sock > /etc/php.d/pdo_mysql.ini
+      echo opcache.enable_cli=1 >> /etc/php.d/opcache.ini
+      echo opcache.protect_memory=1 >> /etc/php.d/opcache.ini
+    displayName: 'Install Build'

azure/job.yml

@@ -16,15 +16,7 @@ jobs:
         configurationParameters: ${{ parameters.configurationParameters }}
     - script: make -j$(/usr/bin/nproc) >/dev/null
       displayName: 'Make Build'
-    - script: |
-        sudo make install
-        sudo mkdir     /etc/php.d
-        sudo chmod 777 /etc/php.d
-        echo mysqli.default_socket=/var/run/mysqld/mysqld.sock     > /etc/php.d/mysqli.ini
-        echo pdo_mysql.default_socket=/var/run/mysqld/mysqld.sock  > /etc/php.d/pdo_mysql.ini
-        echo opcache.enable_cli=1 >> /etc/php.d/opcache.ini
-        echo opcache.protect_memory=1 >> /etc/php.d/opcache.ini
-      displayName: 'Install Build'
+    - template: install.yml
     - script: |
         mysql -uroot -proot -e "CREATE DATABASE IF NOT EXISTS test"
         sudo -u postgres psql -c "ALTER USER postgres PASSWORD 'postgres';"