[RFU] expat-2.1.0-3

[Warren Young]

This release simply fixes the libexpat${abi}-devel naming problem 
brought up by Yaakov, using the new PKG_OBSOLETES feature of cygport.

It includes no upstream release changes, because there haven't been any.

From within x86/release/expat:

wget -e robots=off --cut-dirs=3 -np -nH -A'*2.1.0-3*' -A'*.hint' \
     -r http://etr-usa.com/cygwin/x86/expat/


From within x86_64/release/expat:

wget -e robots=off --cut-dirs=3 -np -nH -A'*2.1.0-3*' -A'*.hint' \
     -r http://etr-usa.com/cygwin/x86_64/expat/