[pgo] MB configs for Linux PGO

MB configs for Linux PGO builders.
Adding MB configs for beta and stable trybots for PGO linux as well.

Bug: 1105530
Change-Id: Ie4f01a244abfd5cd9e89fe583e7acb8706ef99cb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2307633Reviewed-by: Garrett Beaty <gbeaty@chromium.org>
Commit-Queue: Jeff Yoon <jeffyoon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#790666}

tools/mb/mb_config.pyl

@@ -36,6 +36,9 @@
     },
 
     'chrome.pgo': {
+      'linux-pgo-beta': 'official_goma_linux_pgo',
+      'linux-pgo-stable': 'official_goma_linux_pgo',
+      'linux-pgo-trunk': 'official_goma_linux_pgo',
       'mac-pgo-beta': 'official_goma_mac_pgo',
       'mac-pgo-stable': 'official_goma_mac_pgo',
       'mac-pgo-trunk': 'official_goma_mac_pgo',
@@ -792,6 +795,8 @@
       'chromeos-kevin-chrome': 'chromeos_kevin_include_unwind_tables_official',
       'chromeos-kevin-compile-chrome': 'chromeos_kevin_include_unwind_tables_official',
       'linux-chrome': 'official_goma',
+      'linux-chrome-beta': 'official_goma',
+      'linux-chrome-stable': 'official_goma',
       'linux-chromeos-chrome': 'official_goma_chromeos_include_unwind_tables',
       'mac-chrome': 'official_goma',
       'mac-chrome-beta': 'official_goma',
@@ -2121,6 +2126,10 @@
       'official', 'goma', 'no_gnome_keyring', 'minimal_symbols',
     ],
 
+    'official_goma_linux_pgo': [
+      'official', 'goma', 'static', 'no_symbols', 'pgo_phase_1',
+    ],
+
     'official_goma_chromeos': [
       'official', 'goma', 'chromeos',
     ],