missing include path added to mdnssd.qbs

On Windows in buildDirectory/mdnssd EventLog.h and friends get created.

Change-Id: Icc830c837d4da6ff8773b654e7b63470f87b06d4
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@nokia.com>

src/tools/mdnssd/mdnssd.qbs

@@ -74,6 +74,7 @@ QtcTool {
 
     Properties {
         condition: qbs.targetOS === "windows"
+        cpp.includePaths: outer.concat([buildDirectory + "/" + name])
         cpp.defines: outer.concat([
             "WIN32",
             "_WIN32_WINNT=0x0501", "NDEBUG", "MDNS_DEBUGMSGS=0", "TARGET_OS_WIN32",