[gobo-eiffel-develop] Include path for Boehm GC

[Colin A. <col...@go...>]

I was compiling tonight on my Linux box in London. I installed Boehm
7.0 (rather than 6.7 which I installed at home) as that is what I was
able to install on Windows.

However, when it got to the C compile stage, errors were coming out
that it couldn't find gc.h.

I took a look, and I saw that the header files had been installed into
$BOEHM_GC/include/gc
. So I have copied them to the parent directory and I trying again.

It may be therefore that the gcc.cfg file I checked in only works with
6.7 and not 7.0. I shall check on this at the weekend (if the compile
now works).