Update .gitignore

Change-Id: If4de9b2f2b469f45b2d579d0401bde44d3477d3c
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>

.gitignore

@@ -120,6 +120,7 @@ config.opt
 config.status
 config.summary
 config.log
+config.cache
 mkspecs/default
 mkspecs/default-host
 mkspecs/qconfig.pri
@@ -127,12 +128,14 @@ mkspecs/qdevice.pri
 mkspecs/qfeatures.pri
 mkspecs/qhost.pri
 moc_*.cpp
+qmake/qmake
 qmake/qmake.exe
 qmake/Makefile.bak
 qmake/qmake_pch.pch
 src/corelib/global/qconfig.cpp
 src/corelib/global/qconfig.h
 src/corelib/global/qconfig.h.qmake
+src/corelib/global/qconfig_p.h
 src/corelib/global/qfeatures.h
 src/platformsupport/*_interface.*
 src/platformsupport/*_adaptor.*
@@ -155,6 +158,9 @@ translations/*_untranslated.ts
 qrc_*.cpp
 *.version
 *.version.in
+qt*-config.h
+qt*-config_p.h
+qt*-config.pri
 
 # Test generated files
 QObject.log