Merge pull request #18201 from apolcyn/fix_thing

Build c-ares bazel lib with alwayslink=1

test/cpp/end2end/cfstream_test.cc

@@ -270,9 +270,6 @@ int main(int argc, char** argv) {
   ::testing::InitGoogleTest(&argc, argv);
   grpc_test_init(argc, argv);
   gpr_setenv("grpc_cfstream", "1");
-  // TODO (pjaikumar): remove the line below when
-  // https://github.com/grpc/grpc/issues/18080 has been fixed.
-  gpr_setenv("GRPC_DNS_RESOLVER", "native");
   const auto result = RUN_ALL_TESTS();
   return result;
 }

third_party/cares/cares.BUILD

@@ -170,4 +170,5 @@ cc_library(
     visibility = [
         "//visibility:public",
     ],
+    alwayslink = 1,
 )