move several applets to more correct ex-project. No code changes.
diff --git a/editors/Kbuild b/editors/Kbuild
index d991e1f..76302aa 100644
--- a/editors/Kbuild
+++ b/editors/Kbuild
@@ -6,6 +6,8 @@
 
 lib-y:=
 lib-$(CONFIG_AWK)       += awk.o
+lib-$(CONFIG_CMP)       += cmp.o
+lib-$(CONFIG_DIFF)      += diff.o
 lib-$(CONFIG_ED)        += ed.o
 lib-$(CONFIG_PATCH)     += patch.o
 lib-$(CONFIG_SED)       += sed.o