Build chip data from new JSON format

The chip data XML format has been deprecated and the new JSON format
will be used going forward.

Signed-off-by: Zane Shelley <zshelle@us.ibm.com>
Change-Id: I2f44ae7bb921c9ab38c2664ab5cc2a9d6e2fd66a
diff --git a/.gitignore b/.gitignore
index 82d41a6..d3304ad 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 /build
 /subprojects/googletest
 /cppcheck-temp
+/.cache