infra: Fix UBSAN build.

The compilation of the trace tests would fail in UBSAN with
optimization disabled. Fix this by allowing optimization of the
large traces when running under UBSAN.

Bug: angleproject:5795
Change-Id: Ib11514a00495ed1af4faeecca81283f4c98da135
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3283164
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

gni/angle.gni

@@ -557,7 +557,7 @@ template("angle_trace") {
     }
 
     # Disable optimization in the trace perf tests to avoid optimizing huge files.
-    if (!is_debug) {
+    if (!is_debug && !is_ubsan) {
       suppressed_configs += [
         "//build/config/compiler:afdo",
         "//build/config/compiler:afdo_optimize_size",