Roll ASan/Win to r217738

Also update the name of the asan dynamic runtime thunk .lib since it was changed in LLVM r217673.
After this change, component ASan build should be able to report NULL derefs and other AVs the same way as the static build does.

BUG=345874

Review URL: https://codereview.chromium.org/573743002

Cr-Commit-Position: refs/heads/master@{#294857}

build/common.gypi

@@ -5558,7 +5558,7 @@
                   'VCLinkerTool': {
                     'AdditionalDependencies': [
                        'clang_rt.asan_dynamic-i386.lib',
-                       'clang_rt.asan_uar_thunk-i386.lib',
+                       'clang_rt.asan_dynamic_runtime_thunk-i386.lib',
                     ],
                   },
                 }],

tools/clang/scripts/update.py

@@ -22,7 +22,7 @@ LLVM_WIN_REVISION = 'HEAD'
 # in bringup. Use a pinned revision to make it slightly more stable.
 if (re.search(r'\b(asan)=1', os.environ.get('GYP_DEFINES', '')) and
     not 'LLVM_FORCE_HEAD_REVISION' in os.environ):
-  LLVM_WIN_REVISION = '217219'
+  LLVM_WIN_REVISION = '217738'
 
 # Path constants. (All of these should be absolute paths.)
 THIS_DIR = os.path.abspath(os.path.dirname(__file__))