ci: Wait for grabcov process to terminate

Since addition of internal checks in tdspool the test that uses
tdspool takes more times, sometimes more than other tests.
This cause the script to fail as it tries to use some files that
in the meantime get deleted as the test is still running.

Signed-off-by: Frediano Ziglio <[email protected]>

misc/freetds_autobuild

@@ -314,16 +314,17 @@ test_mssql2008() {
 
 test_mssql2000() {
 	trap 'echo Error $? at line $LINENO' ERR
-	local pid_pool
+	local pid_pool pid_grab
 	cd test2
 	./misc/grabcov -o pool.cov_info -- ./src/pool/tdspool msde &> /dev/null &
-	pid_pool=$!
+	pid_grab=$!
 	sleep 5
-	pid_pool=$(pgrep -P $pid_pool tdspool)
+	pid_pool=$(pgrep -P $pid_grab tdspool)
 	cd ..
 	# do tests with mssql 2000
 	generic_test test2 PWD.msde_pool
 	kill $pid_pool
+	wait $pid_grab
 }
 
 left=(test1 test_mssql2008 test_mssql2000 test_sybase15)