[Chrome OS][libFuzzer] Make config use component builds

We want to eventually switch most libFuzzer builds to component builds
in order to save the space. The Chrome OS one is a good build to test
component builds with since it isn't running already.

Bug: 701825
Change-Id: I43bf889e20ef54c51a5bbce1e9976ff1636fe3fb
Reviewed-on: https://chromium-review.googlesource.com/c/1355329Reviewed-by: Max Moroz <mmoroz@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Jonathan Metzman <metzman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612281}

tools/mb/mb_config.pyl

@@ -1468,7 +1468,7 @@
       'libfuzzer', 'asan', 'debug_bot', 'chromeos_codecs', 'pdf_xfa', 'disable_nacl', 'optimize_for_fuzzing',
     ],
     'libfuzzer_chromeos_asan_release_bot': [
-      'libfuzzer', 'asan', 'chromeos_with_codecs', 'release_bot', 'pdf_xfa', 'disable_nacl', 'optimize_for_fuzzing',
+      'libfuzzer', 'asan', 'chromeos_with_codecs', 'shared_release_bot', 'pdf_xfa', 'disable_nacl', 'optimize_for_fuzzing',
     ],
     'libfuzzer_asan_release_bot': [
       'libfuzzer', 'asan', 'release_bot', 'chromeos_codecs', 'pdf_xfa', 'disable_nacl', 'optimize_for_fuzzing',