bug#14513: 24.3.50; Site load-path pieces differ in MSYS build

[Glenn Morris]

Richard Copley wrote:

> Would it be doable and generally useful to take account of an
> EMACSSITELOADPATH environment variable, on all platforms?

That is basically (IMO a less good version of)

http://debbugs.gnu.org/cgi/bugreport.cgi?bug=12100

which I think is a reasonable request, but not straightforward to
implement, owing to the messy way this stuff works; and not a high
priority since -L works.