Switch to using stock gcovr 5.2 (sonic-net#1174) (sonic-net#1190)

* Test using stock gcovr

Signed-off-by: Saikrishna Arcot <sarcot@microsoft.com>

.azure-pipelines/build-template.yml

@@ -160,14 +160,14 @@ jobs:
  - ${{ if eq(parameters.run_unit_test, true) }}:
  - script: |
  set -ex
- git clone https://github.com/Spacetown/gcovr.git
+ git clone https://github.com/gcovr/gcovr.git
  cd gcovr/
- git checkout origin/recursive_search_file
+ git checkout 5.2
  sudo pip3 install setuptools
  sudo python3 setup.py install
  cd ..
  sudo rm -rf gcovr
- displayName: "Install gcovr 5.0 with recursive fix"
+ displayName: "Install gcovr 5.2 (for --exclude-throw-branches support)"
  - script: |
  set -ex
  # Add SYS_TIME capability for settimeofday ok in syncd test