Add FFDC collection

Add a class to watch for the presence of SBEFIFO FFDC reported up
through the OCC hwmon driver.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Change-Id: Ia8bf6eddb037aec547b72ecce39c1a977d9374bc
diff --git a/meson.build b/meson.build
index 68f2c21..e6b6c6c 100644
--- a/meson.build
+++ b/meson.build
@@ -138,6 +138,7 @@
         'occ_status.cpp',
         'occ_device.cpp',
         'occ_errors.cpp',
+        'occ_ffdc.cpp',
         'occ_presence.cpp',
         'occ_command.cpp',
         'occ_dbus.cpp',