Fixed the platform parameter ($ARC) for the rpath in link.lux files that was causing failures in Germany.

auth_token/PAM/link.lux

@@ -2,8 +2,8 @@ LINK = $(CC) \
 	-Wl,-Bsymbolic \
 	-shared \
 	-Wl,--version-script=$(TARGET)_$(PLAT).exp \
-	-Wl,-rpath -Wl,/usr/$(ARCH_LlB) \
-	-L/usr/$(ARCH_LIB) -lpthread -lc -lpam -lcasa_auth_token\
+	-Wl,-rpath -Wl,/usr/lib$(ARC) \
+	-L/usr/lib$(ARC) -lpthread -lc -lpam -lcasa_auth_token\
 	-Wl,-soname -Wl,$(TARGET).so \
 	-o $(LIBDIR)$(XTRA)/$(TARGET).so \
 	-L$(LIBDIR)$(XTRA)  \