enable tests in getdeps

Summary: properly find the required GMock version (1.8.0) and allow building tests in getdeps

Reviewed By: mjoras

Differential Revision: D16935741

fbshipit-source-id: 46f62511e2feaf553d028e286a862aa5b30393c6

build/fbcode_builder/manifests/mvfst

@@ -11,12 +11,16 @@ repo_url = https://github.com/facebookincubator/mvfst.git
 builder = cmake
 subdir = .
 
-[cmake.defines]
+[cmake.defines.test=on]
+BUILD_TESTS = ON
+
+[cmake.defines.test=off]
 BUILD_TESTS = OFF
 
 [dependencies]
 folly
 fizz
+googletest_1_8
 
 [shipit.pathmap]
 fbcode/quic/public_root = .