windeployqt: Query qmake once and store in map.

Change-Id: I4bb93404e4ceb97ce5b1a8c9979e06460bdeabda
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
windeployqt: Add namefilter to updateFile.

Change-Id: I5dbebef725195ca7c43bc653f5defa52d3b45714
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
windeployqt: Copy Quick 1, 2 imports.

Change the plugintype enumeration to be a module enumeration
which works better. Deploy imports with some smartness.

Change-Id: I4777816a24f4e13fb5416e9467357464e4e7ac21
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>