TT#42767 Add tag column to firmware table

Allows to identify firmwares by a given tag, if the firmware consists
of multiple files and the phone fetches them by hardcoded names.

Change-Id: I5325895da642d306c92ab1e03264ba128cc295a6

db_scripts/diff/15422.down

@@ -0,0 +1,3 @@
+USE provisioning;
+
+ALTER TABLE autoprov_firmwares DROP COLUMN tag;

db_scripts/diff/15422.up

@@ -0,0 +1,3 @@
+USE provisioning;
+
+ALTER TABLE autoprov_firmwares ADD COLUMN tag VARCHAR(255) DEFAULT NULL;