[Ecls-list] build bugs on win32

[Yaroslav Kavenchuk]

> 2. I have installed gmp-4.2.1 on /usr/local (mingw)
>
> $ ./configure --with-system-gmp --with-gmp-prefix=/usr/local
> --with-gmp-incdir=/usr/local/include --with-gmp-libdir=/usr/local/lib

My bug - need full windows path:

$ ./configure --with-system-gmp --with-gmp-prefix="C:/gnu/local"

Thanks!

-- 
WBR, Yaroslav Kavenchuk.