Add lib infix for QtUiTools to distinguish different Qt edition: e.g. "E" for embedded, "" for X11

Patch has been accepted upstream and should be included in the next major version (4.8.0), see:
http://bugreports.qt.nokia.com/browse/QTBUG-7169

Original Author: Jeremy Lainé <jeremy.laine@m4x.org>
Ported from OE by: Yu Ke <ke.yu@intel.com>
Upstream-Status: Accepted

--- /tmp/uitools.prf	2009-12-01 18:38:22.000000000 +0100
+++ qt-everywhere-opensource-src-4.6.0/mkspecs/features/uitools.prf	2009-12-01 18:58:16.000000000 +0100
@@ -3,11 +3,11 @@
 
 # Include the correct version of the UiLoader library
 symbian: QTUITOOLS_LINKAGE = -lQtUiTools.lib
-else: QTUITOOLS_LINKAGE = -lQtUiTools
+else: QTUITOOLS_LINKAGE = -lQtUiTools$${QT_LIBINFIX}
 
 CONFIG(debug, debug|release) {
-    mac: QTUITOOLS_LINKAGE = -lQtUiTools_debug
-    win32: QTUITOOLS_LINKAGE = -lQtUiToolsd
+    mac: QTUITOOLS_LINKAGE = -lQtUiTools$${QT_LIBINFIX}_debug
+    win32: QTUITOOLS_LINKAGE = -lQtUiTools$${QT_LIBINFIX}d
 }
 LIBS += $$QTUITOOLS_LINKAGE
 
--- /tmp/uitools.pro	2009-12-01 18:40:28.000000000 +0100
+++ qt-everywhere-opensource-src-4.6.0/tools/designer/src/uitools/uitools.pro	2009-12-01 18:59:18.000000000 +0100
@@ -1,5 +1,5 @@
 TEMPLATE = lib
-TARGET = $$qtLibraryTarget(QtUiTools)
+TARGET = QtUiTools
 QT += xml
 CONFIG += qt staticlib
 DESTDIR = ../../../../lib
@@ -43,3 +43,5 @@
    QMAKE_PKGCONFIG_DESTDIR = pkgconfig
    QMAKE_PKGCONFIG_REQUIRES += QtXml
 }
+
+TARGET = $$qtLibraryTarget($$TARGET$$QT_LIBINFIX) #do this towards the end