[build] Add cfi clusterfuzz bot

This is for infra-side:
https://chromium-review.googlesource.com/c/573544

NOTRY=true

Bug: chromium:726584
Change-Id: I0dbe8cf8e107ad13d284dd2347935a225261abe8
Reviewed-on: https://chromium-review.googlesource.com/573545
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46695}

infra/mb/mb_config.pyl

@@ -116,6 +116,7 @@
           'gn_debug_simulate_arm_asan_edge',
       'V8 Linux ASAN mipsel - debug builder':
           'gn_debug_simulate_mipsel_asan_edge',
+      'V8 Linux64 CFI - release builder': 'gn_release_x64_cfi_clusterfuzz',
       'V8 Linux MSAN no origins':
           'gn_release_simulate_arm64_msan_no_origins_edge',
       'V8 Linux MSAN chained origins':
@@ -377,6 +378,8 @@
       'v8_verify_heap'],
     'gn_release_x64_cfi': [
       'gn', 'release_bot', 'x64', 'cfi', 'swarming'],
+    'gn_release_x64_cfi_clusterfuzz': [
+      'gn', 'release_bot', 'x64', 'cfi_clusterfuzz'],
     'gn_release_x64_clang': [
       'gn', 'release_bot', 'x64', 'clang', 'swarming'],
     'gn_release_x64_concurrent_marking': [
@@ -536,6 +539,12 @@
       'gyp_defines': 'cfi_vptr=1 cfi_diag=1',
     },
 
+    'cfi_clusterfuzz': {
+      'gn_args': ('is_cfi=true use_cfi_cast=true use_cfi_diag=true '
+                  'use_cfi_recover=true'),
+      'gyp_defines': 'cfi_vptr=1 cfi_diag=1',
+    },
+
     'clang': {
       'gn_args': 'is_clang=true',
       'gyp_defines': 'clang=1',