azure-pipelines: make gitdaemon tests work on Win32

On Win32 builds, the PID file created by git-daemon contained in invalid
PID that we were not able to kill afterwards. Somehow, it seems like the
contained PID was wrapped in braces. Consequentially, kill(1) failed and
thus caused the build to error.

Fix this by directly grabbing the PID of the spawned git-daemon process.

azure-pipelines/test.sh

@@ -16,9 +16,9 @@ SUCCESS=1
 cleanup() {
 	echo "Cleaning up..."
 
-	if [ ! -z "$GITDAEMON_DIR" -a -f "${GITDAEMON_DIR}/pid" ]; then
+	if [ ! -z "$GITDAEMON_PID" ]; then
 		echo "Stopping git daemon..."
-		kill $(cat "${GITDAEMON_DIR}/pid")
+		kill $GITDAEMON_PID
 	fi
 
 	if [ ! -z "$SSHD_DIR" -a -f "${SSHD_DIR}/pid" ]; then
@@ -73,7 +73,8 @@ if [ -z "$SKIP_GITDAEMON_TESTS" ]; then
 	echo "Starting git daemon..."
 	GITDAEMON_DIR=`mktemp -d ${TMPDIR}/gitdaemon.XXXXXXXX`
 	git init --bare "${GITDAEMON_DIR}/test.git"
-	git daemon --listen=localhost --export-all --enable=receive-pack --pid-file="${GITDAEMON_DIR}/pid" --base-path="${GITDAEMON_DIR}" "${GITDAEMON_DIR}" 2>/dev/null &
+	git daemon --listen=localhost --export-all --enable=receive-pack --base-path="${GITDAEMON_DIR}" "${GITDAEMON_DIR}" 2>/dev/null &
+	GITDAEMON_PID=$!
 fi
 
 if [ -z "$SKIP_PROXY_TESTS" ]; then