[Wconversion] Suppress warnings
Bug: 56258
Bug: 58162

Change-Id: I3c302473864a22cfe84eca36b9f9b9b75457799a
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/c-ares/+/422712
Reviewed-by: Petr Hosek <phosek@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index ab97e9d..8d13bc8 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -88,5 +88,6 @@
     "windows_port.c",
   ]
 
+  cflags = [ "-Wno-conversion" ]
   public_configs = [ ":cares_config" ]
 }