Building Wx under Perl 5.10

Hi,

As ActiveState have released a beta of the first 5.10 ActivePerl, thought I'd 
check if my PPM building scripts work OK. Thought it would be nice to provide 
5.10 PPMs as soon as ActivePerl 1000 is released (PPMs should also work with 
the first non-alpha release of Strawberry Perl, I think). 

Can report everything builds fine under MinGW and seems to work as expected.

Only alteration required was in Wx::Demo.
At line 360 : $INC{$f} = 'skip it';
causes a fatal error.