Squish: Add Qt5.2.1 and kit settings for Linux

Change-Id: Ice81f6f29d769296c356e3fc8472d327b5b09a3b
Reviewed-by: Robert Loehning <robert.loehning@digia.com>
Squish: Add Qt5.2.1 and kit settings for Mac

Change-Id: If38f9835da2839f40ef7ed3d3c9542d974a2a9dd
Reviewed-by: Robert Loehning <robert.loehning@digia.com>
Squish: Add Qt5.2.1 and kit settings for Win

Change-Id: I8805c9d7e687cf19525075b41f080857edd452d9
Reviewed-by: Robert Loehning <robert.loehning@digia.com>
Squish: Use Qt5.2.1 kit if possible

Change-Id: I674c100e12c5553c2cee36ea2d78ba4e6f61a299
Reviewed-by: Robert Loehning <robert.loehning@digia.com>