more privileges for the sake of mysqldump (avoid workaround --no-tablespaces);

--- a/src/Pure/Tools/phabricator.scala	Fri Oct 30 22:56:15 2020 +0100
+++ b/src/Pure/Tools/phabricator.scala	Fri Oct 30 23:43:08 2020 +0100
@@ -372,7 +372,8 @@
         """CREATE USER """ + mysql_user_string +
         """ IDENTIFIED BY """ + SQL.string(mysql_password) + """ PASSWORD EXPIRE NEVER; """ +
         """GRANT ALL ON `""" + (mysql_name + "_%").replace("_", "\\_") +
-        """`.* TO """ + mysql_user_string + ";")).check
+        """`.* TO """ + mysql_user_string + ";" +
+        """GRANT PROCESS ON *.* TO """ + mysql_user_string + ";")).check
 
     config.execute("config set mysql.user " + Bash.string(mysql_name))
     config.execute("config set mysql.pass " + Bash.string(mysql_password))