Do not build main application with testlib

Passing TEST=1 to qmake makes the application run in console.

There are no tests in main.cpp anyway.

Change-Id: Ia5d1e02feb38e635f48169cc47d45738e4556f79
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>

src/app/app.pro

@@ -5,6 +5,7 @@ TEMPLATE = app
 CONFIG += qtc_runnable
 TARGET = $$IDE_APP_TARGET
 DESTDIR = $$IDE_APP_PATH
+QT -= testlib
 
 HEADERS += ../tools/qtcreatorcrashhandler/crashhandlersetup.h
 SOURCES += main.cpp ../tools/qtcreatorcrashhandler/crashhandlersetup.cpp