Add .clang-format without column limit to subdirectory tests/.

A column limit in the test folder can lead to trouble as the RUN, CHECK,
etc. comments can potentially be broken over multiple lines changing
their meaning. Without column limit, clang-format will simply keep the
test author's line breaks.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194248 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/.clang-format b/test/.clang-format
new file mode 100644
index 0000000..4799b66
--- /dev/null
+++ b/test/.clang-format
@@ -0,0 +1,2 @@
+BasedOnStyle: LLVM
+ColumnLimit: 0