Patch: merge src and gcc copies of dwarf2.h

[Tom Tromey]

>>>>> "Ian" == Ian Lance Taylor <iant@google.com> writes:

>> 2009-07-01  Tom Tromey  <tromey@redhat.com>
>> * elf/dwarf2.h: Remove, renaming to...
>> * dwarf2.h: ... this.

Ian> I'm not sure I really understand what the problem is.  After all, we
Ian> already share files in the include directory between gcc and src.  But
Ian> if this seems like the right patch to make, it's OK.

It apparently messes up the standard way to make a merged gcc+src
tree.  I got a report from Joseph Myers about this, but now I can't
find it in the archives.

Tom