make code run from $$fromfile() & infile() find features

there is actually a qmake test for that.

don't copy anything which is related to loading a qmakespec to the new
evaluator, though - either it will actually load a spec (include(,into))
anyway, or it has a clean slate ($$fromfile() and infile()) and anything
spec-related would be pointless.

Change-Id: I291201a2bf823e863b3ec94be91762954612417d
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>

src/shared/proparser/qmakeevaluator.cpp

@@ -1701,6 +1701,7 @@ bool QMakeEvaluator::evaluateFileInto(const QString &fileName, QMakeHandler::Eva
     QMakeEvaluator visitor(m_option, m_parser, m_handler);
     visitor.m_caller = this;
     visitor.m_outputDir = m_outputDir;
+    visitor.m_featureRoots = m_featureRoots;
     if (!visitor.evaluateFile(fileName, type, flags))
         return false;
     *values = visitor.m_valuemapStack.top();