SDK-479 correct latd endpoint

Author: echo-branch

Branch-SDK/Branch-SDK/BranchConstants.m

@@ -76,7 +76,7 @@
 NSString * const BRANCH_REQUEST_ENDPOINT_INSTALL = @"install";
 NSString * const BRANCH_REQUEST_ENDPOINT_REGISTER_VIEW = @"register-view";
 NSString * const BRANCH_REQUEST_ENDPOINT_CPID = @"cpid";
-NSString * const BRANCH_REQUEST_ENDPOINT_LATD = @"latd";
+NSString * const BRANCH_REQUEST_ENDPOINT_LATD = @"cpid/latd";
 
 NSString * const BRANCH_RESPONSE_KEY_BRANCH_IDENTITY = @"identity_id";
 NSString * const BRANCH_RESPONSE_KEY_SESSION_ID = @"session_id";