Re-enable tests in llvm/test/Object, corresponding to line_iterator's
change in r221153.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221265 91177308-0d34-0410-b5e6-96231b3b80d8
[yaml2obj] Allow yaml2obj tool to recognize EF_MIPS_NAN2008 flag

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221268 91177308-0d34-0410-b5e6-96231b3b80d8
Remove "REQUIRES:shell" from tests. They work for me.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221269 91177308-0d34-0410-b5e6-96231b3b80d8