Revert "Report endianness in output of {dwarf, obj}dump"

This reverts commit r218391 as it depends on r218388 and r218389

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218397 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "Add support for ARM and AArch64 BE object files"

This reverts commit r218389 as it depends on r218388.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218398 91177308-0d34-0410-b5e6-96231b3b80d8