egcs-19980803 build on win95/cygwin32

[tprince@cat.e-mail.com]

This version built as cleanly as anything ever does on win95.

 Minor nits:  complaints about redefines of POSIX may be cured
by putting #ifndef POSIX..#endif in the xm-cygwin32.h.  Also, the
tendency to set HAVE_INTTYPES_H erroneously remains, and
that can be cured by putting
#undef HAVE_INTTYPES_H
in following the above.   config.log looks like the tests are as
expected, yet the macro may become defined anyway.

 In order to persuade libf2c to build, I went into libf2c/Makefile.in
and changed the undefined s-lib[if]77 to [if]77.  That one I
suspect may be needed in some builds other than wiin95.

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