Clang build script: use CMake 3.17.1

Bug: 1073518
Change-Id: Ic29cf58a00cb200e5d3aa5565834621d50c169d0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2162825Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Hans Wennborg <hans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#761955}

tools/clang/scripts/build.py

@@ -185,14 +185,14 @@ def AddCMakeToPath(args):
     return
 
   if sys.platform == 'win32':
-    zip_name = 'cmake-3.12.1-win32-x86.zip'
-    dir_name = ['cmake-3.12.1-win32-x86', 'bin']
+    zip_name = 'cmake-3.17.1-win64-x64.zip'
+    dir_name = ['cmake-3.17.1-win64-x64', 'bin']
   elif sys.platform == 'darwin':
-    zip_name = 'cmake-3.12.1-Darwin-x86_64.tar.gz'
-    dir_name = ['cmake-3.12.1-Darwin-x86_64', 'CMake.app', 'Contents', 'bin']
+    zip_name = 'cmake-3.17.1-Darwin-x86_64.tar.gz'
+    dir_name = ['cmake-3.17.1-Darwin-x86_64', 'CMake.app', 'Contents', 'bin']
   else:
-    zip_name = 'cmake-3.12.1-Linux-x86_64.tar.gz'
-    dir_name = ['cmake-3.12.1-Linux-x86_64', 'bin']
+    zip_name = 'cmake-3.17.1-Linux-x86_64.tar.gz'
+    dir_name = ['cmake-3.17.1-Linux-x86_64', 'bin']
 
   cmake_dir = os.path.join(LLVM_BUILD_TOOLS_DIR, *dir_name)
   if not os.path.exists(cmake_dir):