Remove debug symbols from the library in Release configuration
Remove debug symbols from the library in Release configuration

This allows to decrease the framework size (with four architectures)
from 23.8 MiB to 11.7 MiB (current values).

Implements https://github.com/ConnectSDK/Connect-SDK-iOS/issues/133

ConnectSDK/Connect-SDK-iOS,riverlj/Connect-SDK-iOS,ConnectSDK/Connect-SDK-iOS