Add configuration item for .xcconfig file in ios_get_app_version#445

AliSoftware merged 5 commits intowordpress-mobile:iangmaia/trialwordpress-mobile/release-toolkit:iangmaia/trialfrom

iangmaia:add/xconfig-param-on-ios_get_app_versioniangmaia/release-toolkit:add/xconfig-param-on-ios_get_app_versionCopy head branch name to clipboard