Replace things like $$(FOO) to $ENV{FOO}.
This is needed to stop the script from crashing when it sees $$(FOO)
in a .pro file, like in
qtmultimedia/src/plugins/directshow/directshow.pro
A better approach in the future will be to write a Find module that
uses the env var to find the relevant headers, and then instead use a
CMake cache variable, to make the build more robust in case the env
var is removed after first configuring the project.
Change-Id: Ia5b3dc3a90e1d4159a8b90acdade85f34b5165f9
Reviewed-by: Qt CMake Build Bot
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>
c58df80cf7