Fix clang-format CLion integration bug.

CLion's Sax parser threw this error:

Failed to parse clang-format XML replacements. Input: <?xml version='1.0'?>
<replacements xml:space='preserve' incomplete_format='true' line=89>
[...]
[org.xml.sax.SAXParseException; lineNumber: 2; columnNumber: 66; Open quote is expected for attribute "line" associated with an  element type  "replacements".]

Patch by Justine Tunney (jart@google.com)!

git-svn-id: svn://svn.chromium.org/llvm-project/cfe/trunk/tools/clang-format@317205 0b72dbe1-c17f-4bc7-b9db-2b4152be0356
diff --git a/ClangFormat.cpp b/ClangFormat.cpp
index e169b9e..b7179ff 100644
--- a/ClangFormat.cpp
+++ b/ClangFormat.cpp
@@ -289,7 +289,7 @@
               "xml:space='preserve' incomplete_format='"
            << (Status.FormatComplete ? "false" : "true") << "'";
     if (!Status.FormatComplete)
-      outs() << " line=" << Status.Line;
+      outs() << " line='" << Status.Line << "'";
     outs() << ">\n";
     if (Cursor.getNumOccurrences() != 0)
       outs() << "<cursor>"