ios: enable Swift mobule stability for the SDK target

Supersedes: https://github.com/jitsi/jitsi-meet/pull/4818
Fixes: https://github.com/jitsi/jitsi-meet/issues/4812

ios/sdk/sdk.xcodeproj/project.pbxproj

 			baseConfigurationReference = 98E09B5C73D9036B4ED252FC /* Pods-JitsiMeet.debug.xcconfig */;
 			buildSettings = {
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = NO;
+				BUILD_LIBRARY_FOR_DISTRIBUTION = NO;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_IDENTITY = "";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "";
 			baseConfigurationReference = 9C77CA3CC919B081F1A52982 /* Pods-JitsiMeet.release.xcconfig */;
 			buildSettings = {
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = NO;
+				BUILD_LIBRARY_FOR_DISTRIBUTION = YES;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_IDENTITY = "";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "";