libweave: Remove gyp build files.

Also, added notes to examples/build.sh and examples/prerequisites.sh
so that folks know where to turn to.

BUG: 26508278

Change-Id: Ibc224916463383cd75089b9ef1c468bc12d150ca
Reviewed-on: https://weave-review.googlesource.com/2189
Reviewed-by: Vitaly Buka <vitalybuka@google.com>
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index b45bd87..0bb7f26 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -19,6 +19,7 @@
 David Zeuthen <zeuthen@google.com>
 Gene Gutnik <gene@google.com>
 Gerry Fan <gfan@google.com>
+Jacob Marble <jacobmarble@google.com>
 Johan Euphrosine <proppy@google.com>
 Mike Frysinger <vapier@google.com>
 Nathan Bullock <nathanbullock@google.com>