the w32api path change

[Robert Collins]

----- Original Message -----
From: "Earnie Boyd" <earnie_boyd@yahoo.com>
>
> The current patch doesn't do this unless you `configure --prefix=/foo'
> and `make install prefix=/usr'.
>
> As to why, I'm trying to accommodate the dist, srcdist and bindist
> targets so that `make dist' when target = 'cygwin' packages for
> /usr/include/w32api and /usr/lib/w32api while all other targets
package
> in /usr/include and /usr/lib.

The standard way to do this is to install into
$(INCLUDEDIR) where that is defined as
$(prefix)/include/w32api vs $(prefix)/include

no fancy magic required, and it won't break prefix's under any
circumstances.

Rob