Convert host-ipmid -> libipmid

phosphor-host-ipmid now exposes a library along with headers for
interfacing with the ipmi daemon. Compile and link against the new
library.

Change-Id: I4f01c2d658b75d27e11f90013198a4951c62b1f5
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/configure.ac b/configure.ac
index a73fd96..6aca76d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,7 +17,7 @@
 
 # Checks for header files.
 AC_CHECK_HEADER(systemd/sd-bus.h, ,[AC_MSG_ERROR([Could not find systemd/sd-bus.h...systemd development package required])])
-AC_CHECK_HEADER(host-ipmid/ipmid-api.h, ,[AC_MSG_ERROR([Could not find host-ipmid/ipmid-api.h...host-ipmid package required])])
+PKG_CHECK_MODULES([LIBIPMID], [libipmid])
 PKG_CHECK_MODULES([OPENPOWER_DBUS_INTERFACES], [openpower-dbus-interfaces])
 PKG_CHECK_MODULES([SDBUSPLUS], [sdbusplus])
 PKG_CHECK_MODULES([PHOSPHOR_LOGGING], [phosphor-logging])