[lanai] Change reloc to use PIC_ by default and cleanup.

* Change reloc to PIC_;
* Cleanup (clang-format & modify test);



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@270282 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed