[Wconversion] Suppress warnings

Bug: 58162
Change-Id: If66dbbfa37df6868631087f06ccce833128c31cc
diff --git a/BUILD.gn b/BUILD.gn
index 94e0c14..1241c5c 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -20,4 +20,6 @@
   # TODO(47041): UBSan has found an instance of undefined behavior in this target.
   # framing.c:637:31: runtime error: applying zero offset to null pointer
   configs += [ "//build/config:temporarily_disable_ubsan_do_not_use" ]
+
+  configs += [ "//build/config:Wno-conversion" ]
 }