Add timer class support

Watchdog implementation uses sd_event_timer at the backend and this
commit has that timer backend support.

Change-Id: Ib6dbd5d6bb617c20d7361e0852a916aa506d5aad
Signed-off-by: Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com>
diff --git a/configure.ac b/configure.ac
index 2f48a68..2f06b7b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,6 +18,9 @@
 # For linking
 LT_INIT
 
+PKG_CHECK_MODULES([SYSTEMD], [libsystemd >= 221], [], [AC_MSG_ERROR(["systemd required and not found"])])
+PKG_CHECK_MODULES([PHOSPHOR_LOGGING], [phosphor-logging],, [AC_MSG_ERROR([Could not find phosphor-logging...openbmc/phosphor-logging package required])])
+
 # Create configured output
 AC_CONFIG_FILES([Makefile])
 AC_OUTPUT