Add pdr.h to headers in meson.build.

Signed-off-by: Dhruvaraj Subhashchandran <dhruvaraj@in.ibm.com>
Change-Id: I623bbc97e6e5644e12d7c0d791e15f29d2171c4e
diff --git a/libpldm/meson.build b/libpldm/meson.build
index bd10096..b96503f 100644
--- a/libpldm/meson.build
+++ b/libpldm/meson.build
@@ -6,7 +6,8 @@
   'bios_table.h',
   'states.h',
   'fru.h',
-  'utils.h'
+  'utils.h',
+  'pdr.h'
 ]
 
 sources = [