[Libreoffice] cygwin soffice.bin.exe -> soffice.bin gotcha

So, it seems that, some versions at least, of cp in cygwin have a
feature where

cp foo.exe bar
will create a
bar.exe not an unsuffixed bar

and we use cp in gbuild/Deliver.mk

The problem if, as in desktop, we build a soffice.bin.exe and then want
to...
cp soffice.bin.exe soffice.bin
we want to get a soffice.bin, not a soffice.bin.exe, which is what my
version of cp is trying to do :-(

bright ideas ?

C.