[TASK] Update graphics in install tool to match recent guidelines

Created new AI and PDF files for the install tool image processing
section with the current TYPO3 Logo and the Share Font.

Change-Id: I5e552ce5294d80e5fc80670d90557b64985c9038
Fixes: #37720
Releases: 6.0
Reviewed-on: http://review.typo3.org/12658
Reviewed-by: Mario Rimann
Reviewed-by: Philipp Gampe
Tested-by: Philipp Gampe
Reviewed-by: Stefan Neufeind
Reviewed-by: Felix Kopp
Tested-by: Felix Kopp
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer