Debugger: Don't warn about never-hit breakpoints when loading a coredumps

Only check the breakpoints when app was started internally.

Change-Id: I38f0af08a2c137d44a127b254283574277b57eff
Reviewed-on: http://codereview.qt.nokia.com/2751


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: hjk <qthjk@ovi.com>