Revert "Use DW_AT_high_pc and DW_AT_low_pc for the high and low pc for a"
in order to fix the cygwin/mingw bots.

This reverts commit r199990.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199991 91177308-0d34-0410-b5e6-96231b3b80d8