"gmake" loops forever trying to build something in the non existing "ed25519-donna" directory.

> fossil diff --checkin 76f87e0752
Index: Makefile.in
==================================================================
--- Makefile.in
+++ Makefile.in
@@ -24,11 +24,11 @@
 srcdir    = @srcdir@
 bindir    = $(package)@bindir@
 libdir = $(package)@libdir@
 LIBCCDEST = $(libdir)/gforth/$(GFVER)/$(machine)/libcc-named
 libccdir = $(subst $(package),,$(LIBCCDEST))
-LIBS    = keccak threefish ed25519-donna bdelta
+LIBS    = keccak threefish bdelta
 MKDIR   = mkdir
 RMDIR   = rm -rf
 GCC     = gcc
 LIBTOOL         = @GNU_LIBTOOL@
 CFLAGS  = -O3 -fomit-frame-pointer