crashlinux: Never start from default config

Require CONFIG always to be specified. It doesn't make sense to start
with a default config, because CONFIG_CRASH_DUMP=y would not be set.

crashlinux-4.4.67-0.bee

@@ -33,13 +33,13 @@ mee_patch() {
 mee_configure() {
     echo "configure $@"
 
-    if [ -n "$CONFIG" ] ; then
-       cp -v ${CONFIG} .config
-       make -C $S olddefconfig
-    else
-       make -C $S defconfig
+    if [ -z "$CONFIG" ]; then
+        echo "please specifiy old config in environment"
+        exit 1
     fi
 
+    cp -v ${CONFIG} .config
+    make -C $S olddefconfig
     LOCALVERSION="\"${KERNELLOCAL}\""
     sed -i -e "s@CONFIG_LOCALVERSION=.*@CONFIG_LOCALVERSION=${LOCALVERSION}@" .config