[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.
1.1 --- a/configure Wed Jul 22 20:42:23 2009 +0200
1.2 +++ b/configure Sat Aug 01 19:18:12 2009 +0200
1.3 @@ -332,7 +332,7 @@
1.4 has_or_abort prog=flex
1.5 has_or_abort prog=makeinfo
1.6 has_or_abort prog=automake \
1.7 - ver='\(GNU automake\) (1\.[[:digit:]]{2,}\.|[2-9][[:digit:]]*\.)' \
1.8 + ver='\(GNU automake\) (1\.[[:digit:]]{2,}|[2-9][[:digit:]]*\.)' \
1.9 err="'automake' 1.10 or above was not found"
1.10 has_or_abort prog=libtool \
1.11 ver='\(GNU libtool.*\) (2[[:digit:]]*\.|1\.6[[:digit:]]*\.|1\.5\.[2-9][[:digit:]]+)' \