Revert "Fix -u option in dsymutil, to not emit an extra DW_LNE_set_address if...

Revert "Fix -u option in dsymutil, to not emit an extra DW_LNE_set_address if the original line table was empty"

This reverts commit 9bd3ff8b.

Reverting because of test failures:

TEST 'LLVM :: tools/dsymutil/ARM/fat-dylib-update.test' FAILED

Command Output (stderr):
--
+ : 'RUN: at line 2'
+ /b/ml-opt-rel-x86-64-b1/build/bin/dsymutil -oso-prepend-path /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/tools/dsymutil/ARM/.. /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/tools/dsymutil/ARM/../Inputs/fat-test.arm.dylib -o /b/ml-opt-rel-x86-64-b1/build/test/tools/dsymutil/ARM/Output/fat-dylib-update.test.tmp.dSYM
warning: /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/tools/dsymutil/ARM/../Inputs/fat-test.arm.o: timestamp mismatch between object file (2023-05-24 23:42:39.442778779) and debug map (2015-08-05 21:31:26.000000000)
warning: /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/tools/dsymutil/ARM/../Inputs/fat-test.arm.o: timestamp mismatch between object file (2023-05-24 23:42:39.442778779) and debug map (2015-08-05 21:31:26.000000000)
error: lipo: No such file or directory