[gperf] Patch for gperf options

[Alexandre Becoulet]

Hello,

        We use gperf in our assembler project and we found it
more convenient to specify some options directly in source file
rather than on command line. So we wrote a patch for gperf.

        This patch only alter the parsing before keywords reading. 
It enables gperf to read option lines beginning with '%'.

        Currently only %function (-N on command line) option is supported;
but other options can be handled easily.

        This patch contains new test files for gperf, to check the new feature.
All previous tests pass without problem.

Please consider attached patch file.

Regards,

        Cedric Bail <address@hidden>
        Alexandre Becoulet <address@hidden>

gperf-2.7.2-option.diff.gz
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