[build] Fix missing fyi bot config

NOTRY=true
TBR=sergiyb@chromium.org

Bug: chromium:788104
Change-Id: I3f47332a0f0df7a5a016afcb7d0904142176bea3
Reviewed-on: https://chromium-review.googlesource.com/839775Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50271}

infra/mb/mb_config.pyl

@@ -204,6 +204,7 @@
       'v8_linux_gcc_rel': 'gn_release_x86_gcc_minimal_symbols',
       'v8_linux_shared_compile_rel': 'gn_release_x86_shared_verify_heap',
       'v8_linux64_gcc_compile_dbg': 'gn_debug_x64_gcc',
+      'v8_linux64_fyi_rel_ng': 'gn_release_x64_test_features_trybot',
       'v8_linux64_rel_ng': 'gn_release_x64_test_features_trybot',
       'v8_linux64_verify_csa_rel_ng': 'gn_release_x64_verify_csa',
       'v8_linux64_gyp_rel_ng': 'gyp_release_x64',