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/Makefile b/Makefile
index c49462f..911f106 100644
--- a/Makefile
+++ b/Makefile
@@ -66,14 +66,14 @@
   endif
 endif
 
-include file_lists.mk third_party.mk examples.mk tests.mk
-
 ###
 # libweave.so
 
 out/$(BUILD_MODE)/libweave.so : out/$(BUILD_MODE)/libweave_common.a
 	$(CXX) -shared -Wl,-soname=libweave.so -o $@ -Wl,--whole-archive $^ -Wl,--no-whole-archive -lcrypto -lexpat -lpthread -lrt
 
+include file_lists.mk third_party/third_party.mk examples/examples.mk tests.mk
+
 ###
 # src/