macOS: Fix that Info.plist was overwritten in in-source builds

$$PWD and $$OUT_PWD are the same for in-source builds, so rename the
source Info.plist to avoid overwriting it with the same name (which
could easily lead to an accidental git submit of the generated file).

Change-Id: Idc593d8e00dc52f11309eae3b913799fb9b8afdf
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
Reviewed-by: Jake Petroules <jake.petroules@qt.io>

src/app/app.pro

@@ -59,7 +59,7 @@ win32 {
         }
     }
 
-    infoplist = $$cat($$PWD/Info.plist, blob)
+    infoplist = $$cat($$PWD/app-Info.plist, blob)
     infoplist = $$replace(infoplist, @MACOSX_DEPLOYMENT_TARGET@, $$QMAKE_MACOSX_DEPLOYMENT_TARGET)
     infoplist = $$replace(infoplist, @QTCREATOR_COPYRIGHT_YEAR@, $$QTCREATOR_COPYRIGHT_YEAR)
     write_file($$OUT_PWD/Info.plist, infoplist)

src/app/app.qbs

@@ -39,7 +39,7 @@ QtcProduct {
     Depends { name: "ExtensionSystem" }
 
     files: [
-        "Info.plist",
+        "app-Info.plist",
         "main.cpp",
         "qtcreator.xcassets",
         "../shared/qtsingleapplication/qtsingleapplication.h",