[tracer] Suppress non-hermetic actions

Suppresses all non-hermetic actions used by the core.64 build
configurations in infra.

Tested by running:
`fx set core.x64 --with-base //bundles/buildbot:core --with
//bundles:build_infra --with //bundles:test_infra --variant asan-ubsan
--args build_should_trace_actions=true && fx build`

Bug: 64127
Change-Id: I2343aaea4671497784265e1bef496a165305b6d9
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/mesa/+/469495
Reviewed-by: David Turner <digit@google.com>
diff --git a/mesa.gni b/mesa.gni
index 93d81d8..61f7fb3 100644
--- a/mesa.gni
+++ b/mesa.gni
@@ -126,6 +126,7 @@
                              "script",
                            ])
 
+    hermetic_deps = false
     script = "${mesa_build_root}/scripts/gn_script_wrapper.sh"
 
     args = [