[configure] Fix automake version check.

The configure script fails on automake-1.11 (in Fedora-11) since
it looks for 3-digit version number.

Patch fixed by "Yann E. MORIN", with the added comment:

The check for the automake version is not against a 3-digit number,
but really against a 3-part version number, a-la 'x.y.z'. Versions
such as 1.10 and 1.11 are also valid.

syntax: glob

# Generated files

Makefile

ct-ng

docs/ct-ng.1

docs/ct-ng.1.gz

paths.mk

scripts/crosstool-NG.sh

scripts/saveSample.sh

scripts/showTuple.sh

# Temporaries

.*.swp

log.*

# Working files

kconfig/conf

kconfig/mconf

kconfig/**.o

kconfig/**.dep

config.gen/

.config

.config.old

targets/