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/test/data/test_integer_02.expected b/test/data/test_integer_02.expected
index 4b83bd7..0773e08 100644
--- a/test/data/test_integer_02.expected
+++ b/test/data/test_integer_02.expected
@@ -1 +1,2 @@
+// Min signed integer
 .=-2147483648