Add static library for qmake project file parser.

This is needed to build plugins "out of source".

Change-Id: If842cde86e1eb54daa3daf7f9d6f27751f657d9e
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

src/plugins/android/android.qbs

@@ -9,6 +9,7 @@ Project {
         Depends { name: "Qt"; submodules: ["widgets", "xml", "network"] }
         Depends { name: "Core" }
         Depends { name: "Debugger" }
+        Depends { name: "ProParser" }
         Depends { name: "ProjectExplorer" }
         Depends { name: "QmlDebug" }
         Depends { name: "QtSupport" }