meta-google: add json dependency on google-ipmi-sys

The google-ipmi-sys package now depends on json.

Change-Id: Icd86d1673afead997f3d6d2b7c7fea0cec4763d9
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/recipes-google/ipmi/google-ipmi-sys_git.bb b/recipes-google/ipmi/google-ipmi-sys_git.bb
index 6c77212..5a3a6e2 100644
--- a/recipes-google/ipmi/google-ipmi-sys_git.bb
+++ b/recipes-google/ipmi/google-ipmi-sys_git.bb
@@ -14,6 +14,7 @@
 DEPENDS += "sdbusplus"
 DEPENDS += "phosphor-logging"
 DEPENDS += "phosphor-ipmi-host"
+DEPENDS += "nlohmann-json"
 
 S = "${WORKDIR}/git"
 SRC_URI = "git://github.com/openbmc/google-ipmi-sys"