[egcs-970828] Typo in "invoke.texi"

[Gabriel Dos Reis]

	While installing egcs-970828 on Solaris-2.5, I encountered
this error: 

.
.
.
Making info file `gcc.info' from `gcc.texi'.
./invoke.texi:2201: Unknown command `cygnus.com'.
make[1]: *** [gcc.info] Error 2
make[1]: Leaving directory `/tmp/egcs-970828/gcc'
make: *** [install-gcc] Error 2

Best,
-- Gaby
"God never does mathematics."
	-- H. Hahn.