Upgrade jsoncpp to version 1.0.0 to match the copy used by Skia's testing tools.

This mirrors the contents of the upstream repository at...
https://github.com/open-source-parsers/jsoncpp/commit/7165f6ac4c482e68475c9e1dac086f9e12fff0d0

Bug: 17997234
Change-Id: I87a8312f9d030e5027f4ca5b1568f8374a856632
diff --git a/README.version b/README.version
index 2553b05..525b113 100644
--- a/README.version
+++ b/README.version
@@ -1,3 +1,3 @@
-URL: https://github.com/open-source-parsers/jsoncpp/archive/svn-release-0.6.0-rc1.tar.gz
-Version: 0.5.0
+URL: https://github.com/open-source-parsers/jsoncpp/archive/1.0.0.tar.gz
+Version: 1.0.0
 BugComponent: 21001