Fix small typo vodz reported.

README

@@ -1,7 +1,7 @@
 
 * Configuration:
 
-  cp ./extra/Configs/Config.<target arch> .Config
+  cp ./extra/Configs/Config.<target arch> ./Config
 
 Then edit ./Config for your setup.  In particular, modify
 CROSS and KERNEL_SOURCE as necessary.  You may also want