[klibc] klibc/README -> usr/klibc/README

It helps to point people to the right file...

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
diff --git a/README b/README
index fc778e6..41836d0 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-Please see klibc/README for build instructions and for the status of
+Please see usr/klibc/README for build instructions and for the status of
 various platforms.