Fix Exec line in the .desktop file

Authored by wbauer on Apr 5 2017, 9:53 AM.

Description

Fix Exec line in the .desktop file

kcachegrind uses QCommandLineParser now, which (unlike KCmdLineArgs)
does not support the option "-caption".
The .desktop file needs to use "-qwindowtitle" instead.

Differential Revision: https://phabricator.kde.org/D5308

Details