linux: fix broken mailing list link (404)

Signed-off-by: Matheus Tavares Bernardino <matheus.bernardino@oss.qualcomm.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>
(cherry picked from commit 4ba51914e966899910dd7111d7379d6edb3ea1c3)
Signed-off-by: Thomas Perale <thomas.perale@mind.be>

linux/linux.mk

@@ -518,7 +518,7 @@ endif
 # the same $(BR2_MAKE) invocation has shown to cause parallel build
 # issues.
 # The call to disable gcc-plugins is a stop-gap measure:
-#   http://lists.busybox.net/pipermail/buildroot/2020-May/282727.html
+#   https://lore.kernel.org/buildroot/20200512095550.GW12536@scaer
 define LINUX_BUILD_CMDS
 	$(call KCONFIG_DISABLE_OPT,CONFIG_GCC_PLUGINS)
 	$(foreach dts,$(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)), \