Update buidlroot to version 2016.08.1

bsp/buildroot/docs/manual/legal-notice.txt

@@ -41,9 +41,14 @@ There you will find:
   +host-sources/+ subdirectories for target and host packages respectively.
   The source code for packages that set +<PKG>_REDISTRIBUTE = NO+ will not be
   saved.
-  Patches applied to some packages by Buildroot are distributed with the
-  Buildroot sources and are not duplicated in the +sources/+ and +host-sources/+
-  subdirectories.
+  Patches that were applied are also saved, along with a file named +series+
+  that lists the patches in the order they were applied. Patches are under the
+  same license as the files that they modify.
+  Note: Buildroot applies additional patches to Libtool scripts of
+  autotools-based packages. These patches can be found under
+  +support/libtool+ in the Buildroot source and, due to technical
+  limitations, are not saved with the package sources. You may need to
+  collect them manually.
 * A manifest file (one for host and one for target packages) listing the
   configured packages, their version, license and related information.
   Some of this information might not be defined in Buildroot; such items are