Add Prashanth to the CREDITS file on request. Prashanth contributed the json parser originally to XCI:
Add Prashanth to the CREDITS file on request. Prashanth contributed the json
parser originally to XCI:

 http://xenbits.xen.org/gitweb?p=xenclient/toolstack.git;a=history;f=libs/json/json_parse.ml;h=723d2bf068fdf4728de67708b42b168180a4396f;hb=eeff0b8b98dff445c71cd4aaa6cfd98b8bac5d44

Signed-off-by: David Scott <63c9eb0ea83039690fefa11afe17873ba8278a56@eu.citrix.com>

xapi-project/message-switch,djs55/forkexecd,xapi-project/message-switch,xapi-project/message-switch,johnelse/forkexecd