Update the path's in the README to not point to 'ubuntu' anymore.

The directories have been reorganized.

Change-Id: I7318f53534df3284cb3bfe6013e3a8de18c14cd1
Reviewed-on: https://weave-review.googlesource.com/1370
Reviewed-by: Stefan Sauer <ensonic@google.com>

libweave/README

diff --git a/libweave/README b/libweave/README
index 7e519b9..a4875fd 100644
--- a/libweave/README
+++ b/libweave/README
@@ -34,16 +34,16 @@
   libweave_standalone.gyp
   libweave_common.gypi
 
-Quick start on Ubuntu
----------------------
+Quick start on Debian/Ubuntu
+----------------------------
 
 Install prerequisites:
 
-  examples/ubuntu/prerequisites.sh
+  examples/prerequisites.sh
 
 Build library, tests, run tests, build example:
 
-  examples/ubuntu/build.sh
+  examples/build.sh
 
 Execute example: