[Wconversion] Suppress warnings

Bug: 58162
Change-Id: Ic40b6209a2923f0b2341fdb7134886dd6ac1a0c4
diff --git a/BUILD.gn b/BUILD.gn
index e6be4a3..19ab857 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -101,6 +101,8 @@
     ]
 
     cflags = [ "-msse4.1" ]
+
+    configs += [ "//build/config:Wno-conversion" ]
   }
   # TODO(dalecurtis): If libopus ever adds AVX support, add an opus_avx block.
 }
@@ -368,5 +370,7 @@
       "silk/float/wrappers_FLP.c",
     ]
   }
+
+  configs += [ "//build/config:Wno-conversion" ]
 }