V8: Add s390 bots.

scripts/slave/recipe_modules/v8/builders.py

Index: scripts/slave/recipe_modules/v8/builders.py
diff --git a/scripts/slave/recipe_modules/v8/builders.py b/scripts/slave/recipe_modules/v8/builders.py
index fa7a6a1b932b9442ed46cc1e8a71fb2d1cff7098..76cc135f8931d6701d202de14107bb4954264ce4 100644
--- a/scripts/slave/recipe_modules/v8/builders.py
+++ b/scripts/slave/recipe_modules/v8/builders.py
@@ -1528,6 +1528,28 @@ BUILDERS = {
 ####### Waterfall: client.v8.ports
   'client.v8.ports': {
     'builders': {
+      'V8 Linux - s390 - sim': {
+        'chromium_apply_config': [
+          'clang', 'v8_ninja', 'goma', 'simulate_s390'],
+        'v8_config_kwargs': {
+          'BUILD_CONFIG': 'Release',
+          'TARGET_BITS': 32,
+        },
+        'bot_type': 'builder_tester',
+        'tests': [V8Testing],
+        'testing': {'platform': 'linux'},
+      },
+      'V8 Linux - s390x - sim': {
+        'chromium_apply_config': [
+          'clang', 'v8_ninja', 'goma', 'simulate_s390'],
+        'v8_config_kwargs': {
+          'BUILD_CONFIG': 'Release',
+          'TARGET_BITS': 64,

[kjellander_chromium, 2016/04/06 15:09:59]

So the x in s390x means 64-bit?

[Michael Achenbach, 2016/04/06 16:03:18]

s390x has 64 while s390 has 31 bits (yes 1). I don't really know if the bitness
of the target arch plays any role. Guess not. It's just important that the
simulator runs the correct v8 code.

[Sergiy Byelozyorov, 2016/04/06 16:42:07]

Wow! How does this work?

[Michael Achenbach, 2016/04/06 17:36:44]

The internet has probably a lot of reading material :)
Like: https://en.wikipedia.org/wiki/IBM_ESA/390

+        },
+        'bot_type': 'builder_tester',
+        'tests': [V8Testing],
+        'testing': {'platform': 'linux'},
+      },
       'V8 Linux - x87 - nosnap - debug builder': {
         'v8_apply_config': ['no_snapshot'],
         'chromium_apply_config': [