Implement discovery commands

This commit does the following
- Implements the GetPLDMTypes and GetPLDMCommands commands. These are
  commands that need to be handled by a PLDM device as part of the
  initial PLDM discovery.
- Sets up the build infrastructure: separate libraries for PLDM
  encode/decode libs and the PLDM responder.

Change-Id: I65fa222d2a681c473f579c8e30d84faaf94fe754
Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
diff --git a/libpldm/libpldm.pc.in b/libpldm/libpldm.pc.in
new file mode 100644
index 0000000..d6bdcf8
--- /dev/null
+++ b/libpldm/libpldm.pc.in
@@ -0,0 +1,14 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: libpldm
+Description: PLDM encode/decode C library
+URL: https://github.com/openbmc/pldm/libpldm
+Version: @VERSION@
+Requires: @AX_PACKAGE_REQUIRES@
+Requires.private: @AX_PACKAGE_REQUIRES_PRIVATE@
+Libs: -L@libdir@ -lpldm
+Cflags: -I@includedir@
+