[BUGFIX] RTE: Add TYPO3 version to hash of cached scripts

Problem: Fixed JS scripts may not be loaded when a new version of
TYPO3 is released. This may happen if the version of htmlArea RTE was
not incremented. This is an error-prone situation.
Solution: Add TYPO3 version to hash of cached scripts

Change-Id: I78b94620cf782423fa70b779661ddb759c4915f5
Resolves: #30534
Releases: 4.4, 4.5, 4.6
Reviewed-on: http://review.typo3.org/5511
Reviewed-by: Stanislas Rolland
Tested-by: Stanislas Rolland