Nerf some new gcc 'features'

For now, completely nerf annobin and -fstack-clash-protection; at least
one of those things makes grubx64.efi crash on start.

Signed-off-by: Peter Jones <pjones@redhat.com>

grub.macros

@@ -18,6 +18,9 @@
 	sed							\\\
 		-e 's/-O. //g'					\\\
 		-e 's/-g /-g3 /g'				\\\
+		-e 's/-fstack-clash-protection //g'		\\\
+		-e 's/-fplugin=annobin //g'			\\\
+		-e 's,-specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 ,,g' \\\
 		-e 's/-fstack-protector[[:alpha:]-]\\+//g'	\\\
 		-e 's/-Wp,-D_FORTIFY_SOURCE=[[:digit:]]\\+//g'	\\\
 		-e 's/--param=ssp-buffer-size=4//g'		\\\
@@ -25,6 +28,7 @@
 		-e 's/-fexceptions//g'				\\\
 		-e 's/-fasynchronous-unwind-tables//g'		\\\
 		-e 's/^/ -fno-strict-aliasing /'		\\\
+		-e 's/^/ -fno-stack-clash-protection /'		\\\
 		%{nil}
 
 %global efi_cflags						\\\

grub2.spec

@@ -7,7 +7,7 @@
 Name:		grub2
 Epoch:		1
 Version:	2.02
-Release:	21%{?dist}
+Release:	22%{?dist}
 Summary:	Bootloader with support for Linux, Multiboot and more
 Group:		System Environment/Base
 License:	GPLv3+
@@ -454,6 +454,9 @@ fi
 %endif
 
 %changelog
+* Thu Jan 18 2018 Peter Jones <pjones@redhat.com> - 2.02-22
+- Nerf some gcc 7.2.1-6 'features' that cause grub to crash on start.
+
 * Thu Jan 18 2018 Peter Jones <pjones@redhat.com> - 2.02-21
 - Fix grub2-efi-modules provides/obsoletes generation
   Resolves: rhbz#1506704