Implement initial building of qtbase modules statically

This involves:
1) Building modules in qtbase statically

2) Exporting cmake config files for Qt modules that would allow propagation of dependent libraries.

For example: if an app links against a static QtCore library by doing find_package(QtCore) and using target_link_libraries(QtCore), it should automatically pull in the double-conversion library dependency and link against that as well.

2.1) Idea is to have all dependencies specified in a per-module configure.cmake file as find_package() entries, and then parse the file to extract dependency information, and export that information into the generated cmake config files for each module.

3.x) (semi - optional) Handling auto-importing of plugins as described in https://bugreports.qt.io/browse/QTBUG-75477