[PATCH] Sync libiberty/ & include/ with GCC - addendum: update elfcpp/dwarf.h with...

[PATCH] Sync libiberty/ & include/ with GCC - addendum: update elfcpp/dwarf.h with the new DW_CFA_DUP macro.

From the original email:
  Note this brings in the interface files for libcc1/G++ as well, which
  we will be needing in GDB soon anyway.  That commit renamed a method
  in the C interface and that required a small update to GDB's compile/
  code, which I've included that in this patch to keep the tree
  building.

From the follow up email:
  That breaks gold:

  g++ -DHAVE_CONFIG_H -I. -I../../binutils/gold  -I../../binutils/gold -I../../binutils/gold/../include -I../../binutils/gold/../elfcpp -DLOCALEDIR="\"/usr/share/locale\"" -DBINDIR="\"/usr/bin\"" -DTOOLBINDIR="\"/usr/x86_64-linux/bin\"" -DTOOLLIBDIR="\"/usr/x86_64-linux/lib\""   -W -Wall    -Werror -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -frandom-seed=dwarf_reader.o  -O2 -g -MT dwarf_reader.o -MD -MP -MF .deps/dwarf_reader.Tpo -c -o dwarf_reader.o ../../binutils/gold/dwarf_reader.cc
  In file included from ../../binutils/gold/../elfcpp/dwarf.h:83:0,
                   from ../../binutils/gold/dwarf_reader.cc:30:
  ../../binutils/gold/../include/dwarf2.def:781:1: error: expected ?}? before ?DW_CFA_DUP?
   DW_CFA_DUP (DW_CFA_AARCH64_negate_ra_state, 0x2d)