CrashHandler: Link against utils library

This is what QBS does, too, and it spares us having a self-contained
sub-set of libUtils that can be compiled into the crashhandler.

Change-Id: I94e93192c058fc34e1838aeac536db52a3932157
Reviewed-by: Christian Kandeler <christian.kandeler@theqtcompany.com>
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>

src/tools/qtcreatorcrashhandler/qtcreatorcrashhandler.pro

@@ -1,3 +1,5 @@
+QTC_LIB_DEPENDS += utils
+
 include(../../qtcreatortool.pri)
 
 TARGET = qtcreator_crash_handler
@@ -7,26 +9,13 @@ SOURCES += \
     backtracecollector.cpp \
     crashhandlerdialog.cpp \
     crashhandler.cpp \
-    utils.cpp \
-    ../../libs/utils/qtcassert.cpp \
-    ../../libs/utils/checkablemessagebox.cpp \
-    ../../libs/utils/environment.cpp \
-    ../../libs/utils/fileutils.cpp \
-    ../../libs/utils/hostosinfo.cpp \
-    ../../libs/utils/savefile.cpp
-
+    utils.cpp
 
 HEADERS += \
     backtracecollector.h \
     crashhandlerdialog.h \
     crashhandler.h \
-    utils.h \
-    ../../libs/utils/qtcassert.h \
-    ../../libs/utils/checkablemessagebox.h \
-    ../../libs/utils/environment.h \
-    ../../libs/utils/fileutils.h \
-    ../../libs/utils/hostosinfo.h \
-    ../../libs/utils/savefile.h
+    utils.h
 
 FORMS += \
     crashhandlerdialog.ui