fuchsia: add invtsc to qemu command line

This puts the command line in sync with the fuchsia-internal way of
running emulators, which may help alleviate flakes in Chromium infra.

Bug: chromium:1092054
Change-Id: Ieb0c058d08c7215292286d8d6db059323cf25be4
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/2240144
Commit-Queue: Scott Graham <scottmg@chromium.org>
Reviewed-by: Scott Graham <scottmg@chromium.org>
GitOrigin-RevId: 38f6034998ccae29634b5369ad7166b67d03d9a9
diff --git a/build/run_fuchsia_qemu.py b/build/run_fuchsia_qemu.py
index aff0efd..67463e6 100755
--- a/build/run_fuchsia_qemu.py
+++ b/build/run_fuchsia_qemu.py
@@ -97,7 +97,7 @@
         '-serial', 'stdio',
         '-monitor', 'none',
         '-machine', 'q35',
-        '-cpu', 'host,migratable=no',
+        '-cpu', 'host,migratable=no,+invtsc',
         '-enable-kvm',
         '-netdev', 'type=tap,ifname=qemu,script=no,downscript=no,id=net0',
         '-device', 'e1000,netdev=net0,mac=52:54:00:' + mac_tail,