Copy ICU4C 58 release from icu-project.org to aosp/icu58.

These files were exported from the ICU Subversion repository by running
the following command:

svn export \
  http://source.icu-project.org/repos/icu/icu/tags/release-58-1/ icu4c

Change-Id: I6eba07af4cce61d69f23b0b5ed7d6c92dbb20c51
diff --git a/icu4c/source/Doxyfile.in b/icu4c/source/Doxyfile.in
index c99f270..fde6125 100644
--- a/icu4c/source/Doxyfile.in
+++ b/icu4c/source/Doxyfile.in
@@ -1,4 +1,6 @@
 # Doxyfile 1.3.7
+# Copyright (C) 2016 and later: Unicode, Inc. and others.
+# License & terms of use: http://www.unicode.org/copyright.html
 #  ********************************************************************
 #  * COPYRIGHT:
 #  * Copyright (c) 2004-2015, International Business Machines Corporation