Fix and cleanup of make install related rules in QtLocation examples

Change-Id: I9ef400e22d46e60d50eed785a71e656a0f93fa26
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>
Don't rely on qt_example_installs for complete make install rules

simplelog.txt was not deployed when running make install from outside
Qt source tree.

Change-Id: I420a85fc5f74fb1bfc1b3f63e1f88cf0b0e2a0f9
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>