Build rsihelp.exp using wlink by default (retain option to use GLU).

[git-p4: depot-paths = "//depot/openwatcom/": change = 37527]
Checked in rebuilt rsihelp.exp (linked using wlink, not GLU).
This fixes frequent crashes when starting debuggees with -tr=rsi
(exception 0Dh at xxx:00003469). Problem was caused by bad structure
packing and would happen if and only if debuggee's environment
segment needed to be resized in order to modify the program name
and path.

[git-p4: depot-paths = "//depot/openwatcom/": change = 37528]