[refactoring] Code style adjustments to align with content from Fedora 'selinux-policy' package

This commit contains no functional changes (No-op).
It updates code style to closely match the guidelines and structure outlined in the following resource:
  https://github.com/fedora-selinux/selinux-policy/blob/rawhide/policy/modules/contrib/mysql.fc

--

The differences has been introduced in commits:
  fedora-selinux/selinux-policy@4cd4009
  c4825a8

Author: FaramosCZ

mysql.fc

@@ -28,20 +28,23 @@ HOME_DIR/\.my\.cnf -- gen_context(system_u:object_r:mysqld_home_t, s0)
 /usr/libexec/mysqld	--	gen_context(system_u:object_r:mysqld_exec_t,s0)
 /usr/libexec/mysqld_safe-scl-helper --  gen_context(system_u:object_r:mysqld_safe_exec_t,s0)
 
-# mariadb
 
+/usr/bin/mysqld(-max|-debug)?	--	gen_context(system_u:object_r:mysqld_exec_t,s0)
+/usr/bin/mysqlmanager	--	gen_context(system_u:object_r:mysqlmanagerd_exec_t,s0)
+/usr/bin/ndbd		--	gen_context(system_u:object_r:mysqld_exec_t,s0)
+
+#
+# /usr - mariadb
+#
 /usr/bin/mariadbd-safe	--	gen_context(system_u:object_r:mysqld_safe_exec_t,s0)
 /usr/bin/mariadbd-safe-helper    --      gen_context(system_u:object_r:mysqld_exec_t,s0)
 /usr/bin/mariadb-upgrade	--	gen_context(system_u:object_r:mysqld_exec_t,s0)
 
-/usr/libexec/mariadbd	--	gen_context(system_u:object_r:mysqld_exec_t,s0)
 /usr/bin/mariadbd	--	gen_context(system_u:object_r:mysqld_exec_t,s0)
 
-/usr/bin/mariadb-backup	--	gen_context(system_u:object_r:mysqld_exec_t,s0)
+/usr/libexec/mariadbd	--	gen_context(system_u:object_r:mysqld_exec_t,s0)
 
-/usr/bin/mysqld(-max|-debug)?	--	gen_context(system_u:object_r:mysqld_exec_t,s0)
-/usr/bin/mysqlmanager	--	gen_context(system_u:object_r:mysqlmanagerd_exec_t,s0)
-/usr/bin/ndbd		--	gen_context(system_u:object_r:mysqld_exec_t,s0)
+/usr/bin/mariadb-backup	--	gen_context(system_u:object_r:mysqld_exec_t,s0)
 
 #
 # /var