reserved stack size in ld/emultempl/pe.em seems high

[DJ Delorie]

> Why is the default SizeOfStackReserve set to 0x02000000 in ld/emultempl/pe.em?

GCC needs more than 1Mb of stack to compile itself.

Since the memory is virtual anyway, allocating a lot more than you
need doesn't hurt anything until you actually need it.

Plus, you're better off asking cygwin-specific questions on the cygwin
list, where all the cygwin experts live.