Steps to reproduce the issue:
1. Download and open attached project.
2. Build the project for iOS.
3. After the building process is completed, connect any iOS device and open Xcode.
4. Try compiling the project.

Actual result:
The compilation process fails.

Warning: Multiple build commands for output file /.../libicucore.tbd
error: /.../libicucore.tbd: No such file or directory

Expected result:
The project should be successfully compiled.

Reproduced with:
5.1.5f1, 5.2.5f1, 5.4.0b25, 5.4.0f3.

Cannot reproduce with:
5.3.5f1, 5.3.6p1, 5.5.0a3, 5.5.0a5.