r288399 introduced the DIEUnit class, and in the process broke the corner case where dsymutil generates an empty CU during an LTO link. This restores the logic and adds a test for the corner case. llvm-svn: 294618
r288399 introduced the DIEUnit class, and in the process broke the corner case where dsymutil generates an empty CU during an LTO link. This restores the logic and adds a test for the corner case. llvm-svn: 294618