message: Fix use of PlistBuddy on subsequent recompilations of qrenderdoc on OS X
  * There's an error if you add a property that's already there, so we
  instead delete it each time before adding it.
diff: @@ -133,7 +133,7 @@ win32 {
  ICON = $$OSX_ICONFILE
  INFO_PLIST_PATH = $$shell_quote($$DESTDIR/$${TARGET}.app/Contents/Info.plist)
  - QMAKE_POST_LINK += /usr/libexec/PlistBuddy -c \"Add :CFBundleShortVersionString string $${RENDERDOC_VERSION}.0\" -c \"Set :CFBundleIdentifier org.renderdoc.qrenderdoc\" $${INFO_PLIST_PATH}
  + QMAKE_POST_LINK += /usr/libexec/PlistBuddy -c \"Delete :CFBundleShortVersionString\" -c \"Add :CFBundleShortVersionString string $${RENDERDOC_VERSION}.0\" -c \"Set :CFBundleIdentifier org.renderdoc.qrenderdoc\" $${INFO_PLIST_PATH}
  } else {
  QT += x11extras
  DEFINES += RENDERDOC_PLATFORM_POSIX RENDERDOC_PLATFORM_LINUX RENDERDOC_WINDOWING_XLIB RENDERDOC_WINDOWING_XCB
  