GYP to GN Migration Changes

This file tracks changes to configuration meta build configuration variables in the GYP to GN migration.

Removed:

sb_disable_cpp14_audit sb_disable_microphone_idl starboard_path tizen_os includes_starboard

Renamed:

sb_deploy_output_dir -> sb_install_output_dir OS == starboard -> is_starboard sb_evergreen -> sb_is_evergreen sb_evergreen_compatible -> sb_is_evergreen_compatible sb_evergreen_compatible_libunwind -> sb_evergreen_compatible_use_libunwind sb_evergreen_compatible_lite -> sb_evergreen_compatible_enable_lite

Added:

has_platform_tests has_platform_targets install_target_path