move HOST_IPMI_LIB_PATH to configure.ac

Per TODO in Makefile.am, move the definition of HOST_IPMI_LIB_PATH from
the Makefile to the configure script.

Change-Id: If39bf1193f4502c239a78e21487566b234b746f8
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/Makefile.am b/Makefile.am
index 966dbe4..7024a26 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -27,8 +27,7 @@
 BOOST_CXX = -DBOOST_ERROR_CODE_HEADER_ONLY \
 	    -DBOOST_SYSTEM_NO_DEPRECATED \
 	    -DBOOST_ALL_NO_LIB
-#TODO - Make this path a configure option (bitbake parameter)
-ipmid_CXXFLAGS = -DHOST_IPMI_LIB_PATH=\"/usr/lib/host-ipmid/\" \
+ipmid_CXXFLAGS = \
 		 $(BOOST_CXX) \
                  $(PHOSPHOR_LOGGING_CFLAGS) \
                  $(PHOSPHOR_DBUS_INTERFACES_CFLAGS) \