cmake XCODE_VERSION examples

SsageParuders/Android_Native_Surface my_libhv/cmake/ios.toolchain.cmake :839 

set_property(GLOBAL PROPERTY XCODE_VERSION "${XCODE_VERSION_INT}")

AxioDL/metaforce ios.toolchain.cmake :886 

set_property(GLOBAL PROPERTY XCODE_VERSION "${XCODE_VERSION_INT}")

mgerdes/Open-Golf build/ios/ios.toolchain.cmake :824 

set_property(GLOBAL PROPERTY XCODE_VERSION "${XCODE_VERSION_INT}")

ucla-vision/xivo thirdparty/ceres-solver/cmake/iOS.cmake :79 

execute_process(COMMAND xcodebuild -version
  OUTPUT_VARIABLE XCODE_VERSION
  ERROR_QUIET
  OUTPUT_STRIP_TRAILING_WHITESPACE)