message: Fix command line sdk parameter for macos build
diff: @@ -237,7 +237,7 @@ app: lib ui
  ifeq ($(osname), mac)
  lib:
  - xcodebuild MACOSX_DEPLOYMENT_TARGET=10.8 SDKROOT=macosx10.11 -project src/lib/osx/TogglDesktopLibrary.xcodeproj
  + xcodebuild -sdk macosx10.11 -project src/lib/osx/TogglDesktopLibrary.xcodeproj
  endif
  ifeq ($(osname), linux)
  