upgrade submodule

benchmarks/Makefile.am

@@ -104,7 +104,7 @@ initialize_submodule:
 	oldpwd=`pwd`
 	cd $(top_srcdir)/third_party
 	git submodule update --init -r
-	cd $(top_srcdir)/third_party/benchmark && cmake -DCMAKE_BUILD_TYPE=Release && make
+	cd $(top_srcdir)/third_party/benchmark && cmake -DCMAKE_BUILD_TYPE=Release -DBENCHMARK_ENABLE_GTEST_TESTS=OFF && make
 	cd $$oldpwd
 	touch initialize_submodule
 	

third_party/benchmark

@@ -1 +1 @@
-Subproject commit 360e66c1c4777c99402cf8cd535aa510fee16573
+Subproject commit 5b7683f49e1e9223cf9927b24f6fd3d6bd82e3f8