Add a unit test for JSON support

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

Makefile

@@ -231,6 +231,7 @@ check-qstring: check-qstring.o qstring.o qemu-malloc.o
 check-qdict: check-qdict.o qdict.o qint.o qstring.o qemu-malloc.o
 check-qlist: check-qlist.o qlist.o qint.o qemu-malloc.o
 check-qfloat: check-qfloat.o qfloat.o qemu-malloc.o
+check-qjson: check-qjson.o qfloat.o qint.o qdict.o qstring.o qlist.o qbool.o qjson.o json-streamer.o json-lexer.o json-parser.o qemu-malloc.o
 
 clean:
 # avoid old build problems by removing potentially incorrect old files

configure

@@ -2092,7 +2092,7 @@ if test `expr "$target_list" : ".*softmmu.*"` != 0 ; then
       tools="qemu-nbd\$(EXESUF) qemu-io\$(EXESUF) $tools"
     if [ "$check_utests" = "yes" ]; then
       tools="check-qint check-qstring check-qdict check-qlist $tools"
-      tools="check-qfloat $tools"
+      tools="check-qfloat check-qjson $tools"
     fi
   elif test "$mingw32" = "yes" ; then
       tools="qemu-io\$(EXESUF) $tools"