Add Windows Clang trybots to the default set.

infra/config/cq.cfg

Index: infra/config/cq.cfg
diff --git a/infra/config/cq.cfg b/infra/config/cq.cfg
index 439f826fcf41cdb278ce9f7846e018e971b2eb1d..38842eb662298d284221fd04c584d28b679249d9 100644
--- a/infra/config/cq.cfg
+++ b/infra/config/cq.cfg
@@ -58,9 +58,13 @@ verifiers {
       builders { name: "mac_x64_rel" }
       builders { name: "presubmit" }
       builders { name: "win_baremetal" }
+      builders { name: "win_clang_dbg" }
+      builders { name: "win_clang_rel" }
       builders { name: "win_compile_dbg" }
       builders { name: "win_drmemory_light" }
       builders { name: "win_rel" }
+      builders { name: "win_x64_clang_dbg" }
+      builders { name: "win_x64_clang_rel" }
       builders { name: "win_x64_gn_dbg" }
       builders { name: "win_x64_gn_rel" }
       builders { name: "win_x64_rel" }