dovecot: Include cli-based tests in the coverage tests

Many areas of the dovecot library are tested via chamuyero scripts, but
these were not being included in the coverage report.

This patch extends the dovecot-auth-cli tests so that they are now
coverage-aware.

cmd/dovecot-auth-cli/test.sh

@@ -8,7 +8,13 @@ init
 # Build the binary once, so we can use it and launch it in chamuyero scripts.
 # Otherwise, we not only spend time rebuilding it over and over, but also "go
 # run" masks the exit code, which is something we care about.
-go build dovecot-auth-cli.go
+if [ "${COVER_DIR}" != "" ]; then
+	go test -covermode=count -coverpkg=../../... -c \
+		$GOFLAGS -tags="coveragebin $GOTAGS"
+	cp coverage_wrapper dovecot-auth-cli
+else
+	go build $GOFLAGS -tags="$GOTAGS" dovecot-auth-cli.go
+fi
 
 for i in *.cmy; do
 	if ! chamuyero $i > $i.log 2>&1 ; then
@@ -19,3 +25,4 @@ for i in *.cmy; do
 done
 
 success
+exit 0