[build] Prepare renaming gcc builders

We'll remove the gcc version from the builder name in a follow up.

TBR=sergiyb@chromium.org
NOTRY=true

Bug: chromium:933093
Change-Id: I65359afd7245f155f7d1fd0519033ab8f8f736bb
Reviewed-on: https://chromium-review.googlesource.com/c/1488758Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Belozorov <sergiyb@chromium.org>
Commit-Queue: Sergiy Belozorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59859}

infra/mb/mb_config.pyl

@@ -89,6 +89,9 @@
       'V8 Linux64 TSAN - builder': 'release_x64_tsan',
       'V8 Linux - arm64 - sim - MSAN': 'release_simulate_arm64_msan',
       # Misc.
+      'V8 Linux gcc': 'release_x86_gcc',
+      'V8 Linux64 gcc - debug': 'debug_x64_gcc',
+      # TODO(machenbach): Remove after switching.
       'V8 Linux gcc 4.8': 'release_x86_gcc',
       'V8 Linux64 gcc 4.8 - debug': 'debug_x64_gcc',
       # FYI.

infra/testing/builders.pyl

@@ -731,6 +731,15 @@
       {'name': 'v8testing'},
     ],
   },
+  'V8 Linux gcc': {
+    'swarming_dimensions' : {
+      'os': 'Ubuntu-16.04',
+    },
+    'tests': [
+      {'name': 'v8testing'},
+    ],
+  },
+  # TODO(machenbach): Remove after switching.
   'V8 Linux gcc 4.8': {
     'swarming_dimensions' : {
       'os': 'Ubuntu-16.04',