Embedded Content Contains Swift Code with Xcode 8 Beta
Check this mentioned in Xcode 8 beta 2 Release Notes:
The new build setting ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES replaces the use of EMBEDDED_CONTENT_CONTAINS_SWIFT. This setting indicates that Xcode should always embed Swift standard libraries in a target for which it has been set, whether or not the target contains Swift code. A typical scenario for using this setting is when a target directly uses or embeds another product which contains Swift code.
Note: EMBEDDED_CONTENT_CONTAINS_SWIFT has been deprecated. (26158130).