[BUGFIX] Change data type of progress field in `tx_l10nmgr_exportdata` and `tx_l10nmgr_importdata` tables from `blob` to `mediumblob`.

Contributor: Christian Zenker <christian.zenker@aoemedia.de>

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/l10nmgr/branches/v4@81122 735d13b6-9817-0410-8766-e36946ffe9aa