build: fix linker flag for latest Xcode toolchains
requested to merge umxprime/vlc:umxprime/package/apple/build/fix-linker-flags-for-xcode-15/001 into master
It seems <sdk_name>_simulator_version_min or <sdk_name>_version_min option isn't supported by the latest linker and the build fails with Xcode 15.
This patch will use the recommended platform_version option instead.