ci: Set CFLAGS on msys2-mingw32 in yaml file as it happens for other jobs

Be consistent, and based on this also perform the lcov job or not

.gitlab-ci.yml

@@ -303,6 +303,7 @@ msys2-mingw32:
   variables:
     MSYSTEM: "MINGW32"
     CHERE_INVOKING: "yes"
+    CFLAGS: -coverage -ftest-coverage -fprofile-arcs
   script:
     - C:\msys64\usr\bin\pacman --noconfirm -Syyuu --ask 20
     - C:\msys64\usr\bin\bash .gitlab-ci/show-execution-environment.sh

.gitlab-ci/test-msys2.sh

@@ -34,7 +34,6 @@ export CCACHE_BASEDIR CCACHE_DIR
 pip3 install --upgrade --user meson==0.60.3
 
 PATH="$(cygpath "$USERPROFILE")/.local/bin:$HOME/.local/bin:$PATH"
-CFLAGS="-coverage -ftest-coverage -fprofile-arcs"
 DIR="$(pwd)"
 export PATH CFLAGS
 
@@ -42,6 +41,7 @@ meson --werror --buildtype debug _build
 cd _build
 ninja
 
+if [[ "$CFLAGS" == *"-coverage"* ]]; then
     lcov \
         --quiet \
         --config-file "${DIR}"/.lcovrc \
@@ -49,13 +49,16 @@ lcov \
         --capture \
         --initial \
         --output-file "${DIR}/_coverage/${CI_JOB_NAME}-baseline.lcov"
+fi
 
 # FIXME: fix the test suite
 meson test --timeout-multiplier "${MESON_TEST_TIMEOUT_MULTIPLIER}" --no-suite flaky || true
 
+if [[ "$CFLAGS" == *"-coverage"* ]]; then
     lcov \
         --quiet \
         --config-file "${DIR}"/.lcovrc \
         --directory "${DIR}/_build" \
         --capture \
         --output-file "${DIR}/_coverage/${CI_JOB_NAME}.lcov"
+fi