Add code coverage for phosphor-host-ipmid.

Change-Id: I940aadefdf0f78182aad1d4e586e3178e2d2fe97
Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
diff --git a/configure.ac b/configure.ac
index ac42e1d..9007582 100644
--- a/configure.ac
+++ b/configure.ac
@@ -71,6 +71,9 @@
     AC_SUBST([OESDK_TESTCASE_FLAGS], [$testcase_flags])
 )
 
+# Add code coverage tool
+AX_CODE_COVERAGE
+
 AC_ARG_VAR(WHITELIST_CONF, [Paths to IPMI whitelisted commands conf files. (default = ${srcdir}/host-ipmid-whitelist.conf)])
 if test -z "$WHITELIST_CONF"; then
         WHITELIST_CONF=${srcdir}/host-ipmid-whitelist.conf