[OrcMCJIT] Fix test after r335508 causing it to fail on green dragon

http://green.lab.llvm.org/green/job/clang-stage1-configure-RA/46572/console

LLVM ERROR: unsupported relocation with subtraction expression, symbol
'__GLOBAL_OFFSET_TABLE_' can not be undefined in a subtraction
expression

Do the same thing as MCJIT/eh-lg-pic.ll.

llvm-svn: 335548