Disable compilation of demo binaries.

--- motif-2.3.8-orig/Makefile.am
+++ motif-2.3.8/Makefile.am
@@ -27,7 +27,6 @@
              include \
              tools \
              clients \
-             doc \
-             demos
+             doc
 AUTOMAKE_OPTIONS = 1.4
 ACLOCAL_AMFLAGS = -I .