QtcProcess: Forward declare Environment in QtcProcess header

Change-Id: If85a8a07b144c94cb6e45f66dcb06573ef07c777
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: hjk <hjk@qt.io>

src/libs/utils/aspects.cpp

@@ -26,6 +26,7 @@
 #include "aspects.h"
 
 #include "algorithm.h"
+#include "environment.h"
 #include "fancylineedit.h"
 #include "layoutbuilder.h"
 #include "pathchooser.h"