Raise the stack size to 4MiB for Win32 binaries
Raise the stack size to 4MiB for Win32 binaries

On Win32, the stack size is a property of the PE binary. The R3 core lib
currently assumes a default stack size of 4MiB, but the Win32 build with
MinGW built binaries with 1MiB stack size.

This fix adjusts the build system parameters to create Win32 binaries
with 4MiB stack size, matching the R3 core lib default assumption.

This fixes CC1732: http://issue.cc/r3/1732

hostilefork/rebol,rebolsource/r3,angerangel/r3bazaar,rebol/rebol,hostilefork/rebol,earl/r3,hostilefork/rebol,rebol/rebol,codebybrett/ren-c,kealist/ren-c,angerangel/r3bazaar,giuliolunati/ren-c,hostilefork/rebol,rebolsource/r3,rebolsource/r3,earl/r3,draegtun/ren-c,kealist/ren-c,hostilefork/rebol,kealist/ren-c,rebol/rebol,earl/r3,codebybrett/ren-c,kealist/ren-c,codebybrett/ren-c,draegtun/ren-c,draegtun/ren-c,codebybrett/ren-c,giuliolunati/ren-c,rgchris/ren-c,codebybrett/ren-c,rgchris/ren-c,angerangel/r3bazaar,hostilefork/rebol,angerangel/r3bazaar,kealist/ren-c,codebybrett/ren-c,giuliolunati/ren-c,earl/r3,kealist/ren-c,rebol/rebol,draegtun/ren-c,mbk/ren-c,giuliolunati/ren-c,mbk/ren-c,rgchris/ren-c,giuliolunati/ren-c,draegtun/ren-c,mbk/ren-c,rgchris/ren-c,mbk/ren-c,draegtun/ren-c,rgchris/ren-c