policycoreutils: fix ALTERNATIVES install location

Fixes: 7817c831 ("policycoreutils: break into smaller packages")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>

package/utils/policycoreutils/Makefile

@@ -135,7 +135,7 @@ endef
 define BuildUtil
   define Package/$(1)/install
 	$(INSTALL_DIR) $$(1)$(2)
-	$(INSTALL_BIN) $$(PKG_INSTALL_DIR)$(2)/$(3) $$(1)$(2)
+	$(INSTALL_BIN) $$(PKG_INSTALL_DIR)$(2)/$(3) $$(1)$(2)/$(if $(ALTS_$(3)),policycoreutils-$(3),$(3))
   endef
 
   $$(eval $$(call BuildPackage,$(1)))