um: Use relative modversions with LD_SCRIPT_DYN

When building a dynamic kernel image use relative symbols with MODVERSIONS.
Signed-off-by: NThomas Meyer <thomas@m3y3r.de>
Signed-off-by: NRichard Weinberger <richard@nod.at>

arch/um/Kconfig.um

@@ -20,6 +20,7 @@ config LD_SCRIPT_DYN
 	bool
 	default y
 	depends on !LD_SCRIPT_STATIC
+        select MODULE_REL_CRCS if MODVERSIONS
 
 source "fs/Kconfig.binfmt"