roll clang_win

No particular reason.  Was just poking around
in here and figured we might as well roll.

Change-Id: Ib161a4b94cb4f272573047e4bd4fd8b59cee79e4
Reviewed-on: https://skia-review.googlesource.com/c/175985
Commit-Queue: Mike Klein <mtklein@google.com>
Auto-Submit: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>

Author: Mike Klein

infra/bots/assets/clang_win/VERSION

@@ -1 +1 @@
-7
+8

infra/bots/assets/clang_win/create.py

@@ -18,7 +18,7 @@
 
 # Copied from CLANG_REVISION here:
 # https://cs.chromium.org/chromium/src/tools/clang/scripts/update.py
-CLANG_REVISION = '331747'
+CLANG_REVISION = '346388'
 CLANG_SUB_REVISION = '1'
 CLANG_PKG_VERSION = '%s-%s' % (CLANG_REVISION, CLANG_SUB_REVISION)
 GS_URL = ('https://commondatastorage.googleapis.com/chromium-browser-clang'

infra/bots/tasks.json

@@ -15205,7 +15205,7 @@
         {
           "name": "skia/bots/clang_win",
           "path": "clang_win",
-          "version": "version:7"
+          "version": "version:8"
         }
       ],
       "command": [
@@ -15341,7 +15341,7 @@
         {
           "name": "skia/bots/clang_win",
           "path": "clang_win",
-          "version": "version:7"
+          "version": "version:8"
         }
       ],
       "command": [
@@ -15477,7 +15477,7 @@
         {
           "name": "skia/bots/clang_win",
           "path": "clang_win",
-          "version": "version:7"
+          "version": "version:8"
         }
       ],
       "command": [
@@ -15613,7 +15613,7 @@
         {
           "name": "skia/bots/clang_win",
           "path": "clang_win",
-          "version": "version:7"
+          "version": "version:8"
         }
       ],
       "command": [
@@ -15749,7 +15749,7 @@
         {
           "name": "skia/bots/clang_win",
           "path": "clang_win",
-          "version": "version:7"
+          "version": "version:8"
         }
       ],
       "command": [
@@ -15885,7 +15885,7 @@
         {
           "name": "skia/bots/clang_win",
           "path": "clang_win",
-          "version": "version:7"
+          "version": "version:8"
         },
         {
           "name": "skia/bots/opencl_headers",
@@ -16026,7 +16026,7 @@
         {
           "name": "skia/bots/clang_win",
           "path": "clang_win",
-          "version": "version:7"
+          "version": "version:8"
         }
       ],
       "command": [
@@ -16162,7 +16162,7 @@
         {
           "name": "skia/bots/clang_win",
           "path": "clang_win",
-          "version": "version:7"
+          "version": "version:8"
         }
       ],
       "command": [
@@ -16299,7 +16299,7 @@
         {
           "name": "skia/bots/clang_win",
           "path": "clang_win",
-          "version": "version:7"
+          "version": "version:8"
         }
       ],
       "command": [
@@ -16435,7 +16435,7 @@
         {
           "name": "skia/bots/clang_win",
           "path": "clang_win",
-          "version": "version:7"
+          "version": "version:8"
         }
       ],
       "command": [
@@ -16571,7 +16571,7 @@
         {
           "name": "skia/bots/clang_win",
           "path": "clang_win",
-          "version": "version:7"
+          "version": "version:8"
         }
       ],
       "command": [
@@ -16707,7 +16707,7 @@
         {
           "name": "skia/bots/clang_win",
           "path": "clang_win",
-          "version": "version:7"
+          "version": "version:8"
         }
       ],
       "command": [