Fix build with new googletest

The new googletest requires prefix to be non-empty.

Exempt-From-Owner-Approval: fix test
Change-Id: Ic039cb657b455919e429a3ec2107893b1734e8a1
diff --git a/libprocessgroup/profiles/test.cpp b/libprocessgroup/profiles/test.cpp
index bc9aade..b37e3e6 100644
--- a/libprocessgroup/profiles/test.cpp
+++ b/libprocessgroup/profiles/test.cpp
@@ -33,14 +33,14 @@
 }
 
 // Test suite instantiations
-INSTANTIATE_TEST_SUITE_P(, JsonSchemaTest,
+INSTANTIATE_TEST_SUITE_P(Cgroups, JsonSchemaTest,
                          ::testing::Values(MakeTestParam<Cgroups>("/cgroups.json"),
                                            MakeTestParam<Cgroups>("/cgroups.recovery.json"),
                                            MakeTestParam<TaskProfiles>("/task_profiles.json")));
-INSTANTIATE_TEST_SUITE_P(, CgroupsTest,
+INSTANTIATE_TEST_SUITE_P(Cgroups, CgroupsTest,
                          ::testing::Values(MakeTestParam<Cgroups>("/cgroups.json"),
                                            MakeTestParam<Cgroups>("/cgroups.recovery.json")));
-INSTANTIATE_TEST_SUITE_P(, TaskProfilesTest,
+INSTANTIATE_TEST_SUITE_P(TaskProfiles, TaskProfilesTest,
                          ::testing::Values(MakeTestParam<TaskProfiles>("/task_profiles.json")));
 
 }  // namespace profiles