[build] Switch cfi bot to gn

NOTRY=true

Bug: chromium:645890,chromium:726584
Change-Id: Ie16650d7e8912233407a7f5b2dcb98f917869bdc
Reviewed-on: https://chromium-review.googlesource.com/541319Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46091}

infra/mb/mb_config.pyl

@@ -95,7 +95,7 @@
       'V8 Linux64 gcc 4.8 - debug': 'gn_debug_x64_gcc',
       # FYI.
       'V8 Linux - swarming staging': 'gn_release_x64',
-      'V8 Linux64 - cfi': 'gyp_release_x64_cfi',
+      'V8 Linux64 - cfi': 'gn_release_x64_cfi',
       'V8 Linux - vtunejit': 'gn_debug_x86_vtunejit',
       'V8 Linux64 - gcov coverage': 'gyp_release_x64_gcc_coverage',
       'V8 Linux - predictable': 'gn_release_x86_predictable',
@@ -372,6 +372,8 @@
     'gn_release_x64_asan_symbolized_edge_verify_heap': [
       'gn', 'release_bot', 'x64', 'asan', 'edge', 'lsan', 'symbolized',
       'v8_verify_heap'],
+    'gn_release_x64_cfi': [
+      'gn', 'release_bot', 'x64', 'cfi', 'swarming'],
     'gn_release_x64_clang': [
       'gn', 'release_bot', 'x64', 'clang', 'swarming'],
     'gn_release_x64_correctness_fuzzer' : [
@@ -498,8 +500,6 @@
     'gyp_release_x64_asan_minimal_symbols_coverage': [
       'gyp', 'release_bot', 'x64', 'asan', 'bb', 'coverage', 'lsan',
       'minimal_symbols', 'swarming'],
-    'gyp_release_x64_cfi': [
-      'gyp', 'release_bot', 'x64', 'cfi', 'swarming'],
     'gyp_release_x64_gcc_coverage': [
       'gyp', 'release_bot', 'x64', 'coverage', 'gcc'],