Use symbol_level=1 on non-debug LLD bots

We needed symbol_level=0 as a workaround for http://crbug.com/706492,
but that's fixed upstream, so we don't need it anymore. Most bots used
symbol_level=1, so the LLD release bots should too.

R=dpranke@chromium.org, hans@chromium.org

Bug: 706492, 782784
Change-Id: Idc8596df997a77e278cea82745430adc4eb25644
Reviewed-on: https://chromium-review.googlesource.com/758702Reviewed-by: Hans Wennborg <hans@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Reid Kleckner <rnk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#515371}

tools/mb/mb_config.pyl

@@ -1212,13 +1212,11 @@
     ],
 
     'clang_tot_shared_release_use_lld_dcheck': [
-      # TODO(crbug.com/706492): Enable symbols when LLD makes PDBs.
-      'clang_tot', 'no_symbols', 'shared', 'release', 'use_lld', 'dcheck_always_on',
+      'clang_tot', 'minimal_symbols', 'shared', 'release', 'use_lld', 'dcheck_always_on',
     ],
 
     'clang_tot_official_static_use_lld_x86': [
-      # TODO(crbug.com/706492): Enable symbols when LLD makes PDBs.
-      'clang_tot', 'no_symbols', 'official', 'static', 'release', 'use_lld', 'x86',
+      'clang_tot', 'minimal_symbols', 'official', 'static', 'release', 'use_lld', 'x86',
     ],
 
     'clang_tot_minimal_symbols_shared_release': [