Revert r242365.

r242365 removed two unrelated files by accident.

llvm-svn: 242366

clang/.arcconfig

@@ -0,0 +1,4 @@
+{
+  "project_id" : "clang",
+  "conduit_uri" : "http://reviews.llvm.org/"
+}

clang/.gitignore

@@ -0,0 +1,35 @@
+#==============================================================================#
+# This file specifies intentionally untracked files that git should ignore.
+# See: http://www.kernel.org/pub/software/scm/git/docs/gitignore.html
+#
+# This file is intentionally different from the output of `git svn show-ignore`,
+# as most of those are useless.
+#==============================================================================#
+
+#==============================================================================#
+# File extensions to be ignored anywhere in the tree.
+#==============================================================================#
+# Temp files created by most text editors.
+*~
+# Merge files created by git.
+*.orig
+# Byte compiled python modules.
+*.pyc
+# vim swap files
+.*.sw?
+.sw?
+
+#==============================================================================#
+# Explicit files to ignore (only matches one).
+#==============================================================================#
+cscope.files
+cscope.out
+
+#==============================================================================#
+# Directories to ignore (do not add trailing '/'s, they skip symlinks).
+#==============================================================================#
+# Clang extra user tools, which is tracked independently (clang-tools-extra).
+tools/extra
+# Sphinx build products
+docs/_build
+docs/analyzer/_build