MFC r258115 (partial);

gperf: bring a small update from Apple Developers tools 4.4

From [1]

offset.patch
Makes use the C offsetof() macro.

We are not merging the size_type.patch as it raises some
(apparently) bogus warnings and is not really used.

[1] http://opensource.apple.com/source/gperf/gperf-9/patches/

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

In contrib/gperf/src/output.cc, use the correct printf length modifier
for a ptrdiff_t.

MFC after: 1 week

upgrade gperf to the last GPLv2 version (3.0.3)

Reviewed by: cognet
Approved by: cognet

Fix clang warnings.

Approved by: philip (mentor)

Fix clang warnings.

Approved by: philip (mentor)

This commit was generated by cvs2svn to compensate for changes in r67064,
which included commits to RCS files with non-trunk default branches.

Zap old files no longer included in gperf 2.7

This commit was generated by cvs2svn to compensate for changes in r58551,
which included commits to RCS files with non-trunk default branches.

NetBSD has sys_errlist in errno.h, not stdio.h like FreeBSD.

Make this compile. they use a variable "abort" which is prototyped.

This commit was generated by cvs2svn to compensate for changes in r18214,
which included commits to RCS files with non-trunk default branches.