[Mips] Add test case to check R_MIPS_HI16 / R_MIPS_LO16 relocations agains _gp_disp symbol.
[Mips] Add test case to check R_MIPS_HI16 / R_MIPS_LO16 relocations
agains _gp_disp symbol.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@199232 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld