Add enumeration for PLDM state set id

Signed-off-by: Tom Joseph <tomjoseph@in.ibm.com>
Change-Id: I1cac91ea78f9b989569541c0cc02d555101ca1c3
diff --git a/libpldm/meson.build b/libpldm/meson.build
index b253bfb..c574027 100644
--- a/libpldm/meson.build
+++ b/libpldm/meson.build
@@ -6,6 +6,7 @@
   'bios_table.h',
   'entity.h',
   'states.h',
+  'state_set.h',
   'fru.h',
   'utils.h',
   'pdr.h'