Flip win_chromium_rel_ng back to GYP, re-add win8_chromium_ng to CQ.

This CL reverts r397982 ( https://codereview.chromium.org/2032613004 )
and also flips the main win CQ bots back to GYP. This will hopefully
get the cycle time and capacity issues for the CQ back under control.

TBR=brucedawson@chromium.org, phajdan.jr@chromium.org
BUG=617837

Review-Url: https://codereview.chromium.org/2035413004
Cr-Commit-Position: refs/heads/master@{#398210}

infra/config/cq.cfg

@@ -79,6 +79,7 @@ verifiers {
         name: "win10_chromium_x64_rel_ng_exp"
         experiment_percentage: 10
       }
+      builders { name: "win8_chromium_ng" }
       builders { name: "win_chromium_compile_dbg_ng" }
       builders { name: "win_chromium_rel_ng" }
       builders { name: "win_chromium_x64_rel_ng" }

tools/mb/mb_config.pyl

@@ -605,7 +605,7 @@
 
     'chromium.win': {
       # Windows bots take too long to link w/ full symbols and time out.
-      'Win Builder': 'swarming_gn_release_bot_minimal_symbols_x86',
+      'Win Builder': 'swarming_gyp_release_bot_minimal_symbols_x86',
       'Win Builder (dbg)': 'swarming_gn_debug_bot_minimal_symbols_x86',
       'Win x64 Builder': 'swarming_gn_release_bot_minimal_symbols_x64',
       'Win x64 Builder (dbg)': 'swarming_gn_debug_bot_minimal_symbols_x64',
@@ -867,7 +867,7 @@
       'win_chromium_compile_rel_ng':
         'swarming_gpu_tests_gn_release_trybot_x86',
       'win_chromium_dbg_ng': 'swarming_gn_debug_trybot_x86',
-      'win_chromium_rel_ng': 'swarming_gpu_tests_gn_release_trybot_x86',
+      'win_chromium_rel_ng': 'swarming_gpu_tests_gyp_release_trybot_x86',
       'win_chromium_syzyasan_rel': 'swarming_gyp_syzyasan_release_trybot_x86',
       'win_chromium_variable': 'findit',
       'win_chromium_variable_archive': 'findit',
@@ -1600,6 +1600,10 @@
       'swarming', 'gn', 'release_bot_minimal_symbols', 'x86',
     ],
 
+    'swarming_gyp_release_bot_minimal_symbols_x86': [
+      'swarming', 'gyp', 'release_bot_minimal_symbols', 'x86',
+    ],
+
     'swarming_gn_release_bot_x64': [
       'swarming', 'gn', 'release_bot', 'x64',
     ],
@@ -1678,6 +1682,10 @@
       'swarming', 'gpu_tests', 'gn', 'release_trybot', 'x86',
     ],
 
+    'swarming_gpu_tests_gyp_release_trybot_x86': [
+      'swarming', 'gpu_tests', 'gyp', 'release_trybot', 'x86',
+    ],
+
     'swarming_gpu_tests_gyp_debug_trybot': [
       'swarming', 'gpu_tests', 'gyp', 'debug_trybot',
     ],