fix building when CPP is set in build env

package/ed/ed-configure-CPP.patch

@@ -0,0 +1,14 @@
+this old configure script has broken CPP logic is CPP is set in the
+host environment
+
+--- ed-0.2/configure
++++ ed-0.2/configure
+@@ -731,6 +731,8 @@
+ rm -f conftest*
+   ac_cv_prog_CPP="$CPP"
+ fi
++else
++  ac_cv_prog_CPP="$CPP"
+ fi
+ CPP="$ac_cv_prog_CPP"
+ echo "$ac_t""$CPP" 1>&4

package/ed/ed.mk

@@ -19,9 +19,11 @@ $(DL_DIR)/$(ED_PATCH):
 
 ed-source: $(DL_DIR)/$(ED_SOURCE) $(DL_DIR)/$(ED_PATCH)
 
+ed-unpacked: $(ED_DIR)/.unpacked
 $(ED_DIR)/.unpacked: $(DL_DIR)/$(ED_SOURCE) $(DL_DIR)/$(ED_PATCH)
 	$(ED_CAT) $(DL_DIR)/$(ED_SOURCE) | tar -C $(BUILD_DIR) $(TAR_OPTIONS) -
 	toolchain/patch-kernel.sh $(ED_DIR) $(DL_DIR) $(ED_PATCH)
+	toolchain/patch-kernel.sh $(ED_DIR) package/ed/ ed-*.patch
 	touch $(ED_DIR)/.unpacked
 
 $(ED_DIR)/.configured: $(ED_DIR)/.unpacked