[Mips] Cleanup assembler code in the test.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@200629 91177308-0d34-0410-b5e6-96231b3b80d8
[ELF] Customize dynamic table tag used for .got.plt section referencing.

The patch reviewed by Shankar Easwaran and Rui Ueyama.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@200630 91177308-0d34-0410-b5e6-96231b3b80d8