libweave: Rename buffet namespace into weave

Namespace renamed only in libweave dirrectory. Namespace of buffet/
stays same.

BUG=brillo:1235
TEST=FEATURES=test emerge-gizmo buffet

Change-Id: If45c63f443fab792b661ea85f57ddacc380d0a13
Reviewed-on: https://chromium-review.googlesource.com/284578
Reviewed-by: Vitaly Buka <vitalybuka@chromium.org>
Commit-Queue: Vitaly Buka <vitalybuka@chromium.org>
Tested-by: Vitaly Buka <vitalybuka@chromium.org>
diff --git a/libweave/src/utils.cc b/libweave/src/utils.cc
index 411e74d..71ea0d4 100644
--- a/libweave/src/utils.cc
+++ b/libweave/src/utils.cc
@@ -16,7 +16,7 @@
 #include <base/json/json_reader.h>
 #include <chromeos/errors/error_codes.h>
 
-namespace buffet {
+namespace weave {
 
 namespace {
 
@@ -106,4 +106,4 @@
   return socket_fd;
 }
 
-}  // namespace buffet
+}  // namespace weave