Tests: Fix compilation with Qt 5.0.1

Change-Id: I6e9d5fd34bec8cbecaa4868b5e07cc11d490d6d4
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

tests/auto/ioutils/ioutils.pro

 include(../qttest.pri)
 
-DEFINES += QT_BOOTSTRAPPED # for shellQuote(). hopefully without side effects ...
+# for shellQuote(). hopefully without side effects ...
+isEqual(QT_MAJOR_VERSION, 4):DEFINES += QT_BOOTSTRAPPED
 INCLUDEPATH += $$IDE_SOURCE_TREE/src/shared
 SOURCES += tst_ioutils.cpp \
     $$IDE_SOURCE_TREE/src/shared/proparser/ioutils.cpp