Rewrite Read Event Buffer to use new API

Lots of hard-coded values in this one, but one value did get replaced
with a lookup. The output matches previous output with the one exception
that now the current manufacturer is used instead of a hard-coded value.

Tested: run ipmitool raw 6 0x35 and check the output
        Before:
        ipmitool raw 6 0x35
         55 55 c0 41 a7 00 00 00 00 00 3a ff 00 ff ff ff
        After:
        ipmitool raw 6 0x35
         55 55 c0 57 01 00 00 00 00 00 3a ff 00 ff ff ff

Signed-off-by: Vernon Mauery <vernon.mauery@linux.intel.com>
Change-Id: I4910d8ee07db6f24d639f9322a0246e10a0260e3
diff --git a/meson.build b/meson.build
index b300247..f73b214 100644
--- a/meson.build
+++ b/meson.build
@@ -181,6 +181,7 @@
     channellayer_dep,
     crypto,
     mapper,
+    nlohmann_json_dep,
     phosphor_dbus_interfaces_dep,
     phosphor_logging_dep,
     sdbusplus_dep,