Add support for vendor specific FruDbusLookup

In the current state, a vendor could not define the FRU's
that he wants to send to the host.

This commit adds a fru_master.json that can be used while
building the master , and the json would be replaced with
fru_master.json from the oem/<vendor>/configurations
directory when compiling for oem's.

Tested By:

IBM machine test :
1. meson build -Doem-ibm=enabled -Dprefix=<>
2. ninja -C build && ninja install
3. in the prefix directory we should see the json file
   from the oem/ibm/configurations folder

Non IBM machine test :
1. meson build -Doem-ibm=disabled -Dprefix=<>
2. ninja -C build && ninja install
3. in the prefix directory we should see the json file
   from the pldm/configurations folder.

Runtime test:
1. on an IBM machine make sure the pldm builds the fru record
   table.

Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
Change-Id: Id3c2746c51a1f99f2038b2af48137133e9d0b405
diff --git a/pldmd/pldmd.cpp b/pldmd/pldmd.cpp
index ca62bbd..58d71ce 100644
--- a/pldmd/pldmd.cpp
+++ b/pldmd/pldmd.cpp
@@ -221,7 +221,8 @@
         PLDM_BIOS, std::make_unique<bios::Handler>(sockfd, hostEID,
                                                    &dbusImplReq, &reqHandler));
     auto fruHandler = std::make_unique<fru::Handler>(
-        FRU_JSONS_DIR, pdrRepo.get(), entityTree.get(), bmcEntityTree.get());
+        FRU_JSONS_DIR, FRU_MASTER_JSON, pdrRepo.get(), entityTree.get(),
+        bmcEntityTree.get());
     // FRU table is built lazily when a FRU command or Get PDR command is
     // handled. To enable building FRU table, the FRU handler is passed to the
     // Platform handler.