Make pip buildable

This package would be very useful if able to be built with pip.  This
commit makes libcper usable from python with
git clone git@github.com:openbmc/libcper.git
pip install libcper

The API at the moment is primitive, and only supports the parse api.  An
example of its usage is included.

Change-Id: I944565c71f616735a738bcc4f815d25251ed27bb
Signed-off-by: Ed Tanous <etanous@nvidia.com>
diff --git a/subprojects/json-c.wrap b/subprojects/json-c.wrap
index e68e6ef..a633336 100644
--- a/subprojects/json-c.wrap
+++ b/subprojects/json-c.wrap
@@ -1,7 +1,8 @@
 [wrap-git]
-revision = json-c-0.18-20240915
+revision = HEAD
 url = https://github.com/json-c/json-c.git
 patch_directory = json-c
 
 [provide]
 json-c = json_c_dep
+