tools: Use config.h from autoconf instead of "buildmakevars2header"

This avoid the need to generate the _paths.h header when the
information is from autoconf anyway.

They are no more users of the "buildmakevars2header" macro, so it can
be removed from "Config.mk".

Also removed the extra "-f" flag where "$(RM)" is used (xl/Makefile).

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Juergen Gross <jgross@suse.com>

tools/config.h.in

@@ -96,6 +96,9 @@
 /* IPXE path */
 #undef IPXE_PATH
 
+/* Xen's libexec path */
+#undef LIBEXEC_BIN
+
 /* OVMF path */
 #undef OVMF_PATH
 
@@ -129,6 +132,30 @@
 /* QMP proxy path */
 #undef STUBDOM_QMP_PROXY_PATH
 
+/* Xen's firmware dir */
+#undef XENFIRMWAREDIR
+
+/* Xen's config dir */
+#undef XEN_CONFIG_DIR
+
+/* Xen's dump directory */
+#undef XEN_DUMP_DIR
+
+/* Xen's lib dir */
+#undef XEN_LIB_DIR
+
+/* Xen's lock dir */
+#undef XEN_LOCK_DIR
+
+/* Xen's log dir */
+#undef XEN_LOG_DIR
+
+/* Xen's runstate path */
+#undef XEN_RUN_DIR
+
+/* Xen's script dir */
+#undef XEN_SCRIPT_DIR
+
 /* Enable large inode numbers on Mac OS X 10.5.  */
 #ifndef _DARWIN_USE_64_BIT_INODE
 # define _DARWIN_USE_64_BIT_INODE 1