PEL: Trace BMC log ID on new PEL, and use fmt

In addition to tracing the PEL ID in the journal when a new PEL is
created, also trace the corresponding OpenBMC event log ID.

Use the fmt library to help with the string formatting as things were
getting out of hand without it.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I3f7e43f2ed39ff1d1d6a65d0412e3a8c82a86b26
diff --git a/configure.ac b/configure.ac
index c275b1d..6dad3da 100644
--- a/configure.ac
+++ b/configure.ac
@@ -215,6 +215,7 @@
             [AC_MSG_ERROR([Could not find fifo_map.hpp])])
 
        AX_PKG_CHECK_MODULES([LIBPLDM], [libpldm])]
+       PKG_CHECK_MODULES([FMT], [fmt])
 )
 
 AC_ARG_ENABLE([dont-send-pels-to-host],