Avoid adding the same DEFINE multiple times to the command line

E.g. on MSVC, QT_CREATOR was passed 14 times ...

Change-Id: Ife39267b0d6f2def1706b823abfd0226325437ae
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

src/libs/cplusplus/cplusplus.pri

-INCLUDEPATH +=$$IDE_SOURCE_TREE/src/libs/3rdparty $$IDE_SOURCE_TREE/src/libs/3rdparty/cplusplus
-INCLUDEPATH += $$PWD
+INCLUDEPATH *= $$IDE_SOURCE_TREE/src/libs/3rdparty
+INCLUDEPATH *= $$IDE_SOURCE_TREE/src/libs/3rdparty/cplusplus
+INCLUDEPATH *= $$PWD
 LIBS *= -l$$qtLibraryName(CPlusPlus)

src/libs/glsl/glsl.pri

 LIBS *= -l$$qtLibraryName(GLSL)
-DEFINES += QT_CREATOR
+DEFINES *= QT_CREATOR

src/libs/languageutils/languageutils.pri

 LIBS *= -l$$qtLibraryName(LanguageUtils)
-DEFINES += QT_CREATOR
+DEFINES *= QT_CREATOR

src/libs/qmleditorwidgets/qmleditorwidgets.pri

-INCLUDEPATH += $$PWD $$PWD/easingpane
+INCLUDEPATH *= $$PWD
+INCLUDEPATH *= $$PWD/easingpane
 greaterThan(QT_MAJOR_VERSION, 4) {
     QT += quick1
 } else {

src/libs/qmljs/qmljs.pri

-INCLUDEPATH += \
-    $$PWD/../../shared \
-    $$PWD/../../shared/qmljs \
-    $$PWD/../../shared/qmljs/parser
+INCLUDEPATH *= $$PWD/../../shared
+INCLUDEPATH *= $$PWD/../../shared/qmljs
+INCLUDEPATH *= $$PWD/../../shared/qmljs/parser
 
 LIBS *= -l$$qtLibraryName(QmlJS)
-DEFINES += QT_CREATOR
+DEFINES *= QT_CREATOR

src/plugins/analyzerbase/analyzerbase.pri

 include(analyzerbase_dependencies.pri)
 
-INCLUDEPATH += $$PWD
+INCLUDEPATH *= $$PWD
 LIBS *= -l$$qtLibraryName(AnalyzerBase)

src/plugins/debugger/debugger.pri

 include(debugger_dependencies.pri)
 
-INCLUDEPATH += $$PWD
+INCLUDEPATH *= $$PWD
 LIBS *= -l$$qtLibraryName(Debugger)

src/plugins/qmljstools/qmljstools.pri

 include(qmljstools_dependencies.pri)
 
-INCLUDEPATH += $$PWD/..
+INCLUDEPATH *= $$PWD/..
 
 LIBS *= -l$$qtLibraryName(QmlJSTools)

src/plugins/qtsupport/qtsupport.pri

 include(qtsupport_dependencies.pri)
 
 LIBS *= -l$$qtLibraryName(QtSupport)
-DEFINES += \
-    QMAKE_AS_LIBRARY \
-    PROPARSER_THREAD_SAFE PROEVALUATOR_THREAD_SAFE PROEVALUATOR_CUMULATIVE
+DEFINES *= QMAKE_AS_LIBRARY
+DEFINES *= PROPARSER_THREAD_SAFE
+DEFINES *= PROEVALUATOR_THREAD_SAFE
+DEFINES *= PROEVALUATOR_CUMULATIVE