texinfo slightly broken since 980328

[Marc Lehmann]

Since 980328, texinfo/configure contains:

EGCS_PROG_INSTALL

(not configure._in_) which results in:

checking how to run the C preprocessor... (cached) gcc -E
checking whether gcc needs -traditional... (cached) no
././configure: EGCS_PROG_INSTALL: command not found
checking for ranlib... (cached) ranlib
checking for texconfig... (cached) true

it's not defined in texinfo/aclocal.m4, and is still in 980404 (I did
a fresh checkout from the cvs tree)

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