[ELF] - Get rid of precompiled input objects from testcases.

We have verneed1.so, verneed2.so files and verneed.so.sh script
to produce them. They were committed long time ago when LLD
was not yet able to produce some sections for versioning
(".gnu.version_r" I think).

There is no point to have them as binaries anymore. Patch
creates asm inputs instead based on verneed.so.sh content.

Differential revision: https://reviews.llvm.org/D38505

llvm-svn: 314889