package/busybox: disable sha1/sha256 hwaccel with x86

Buxybox's init segfault when built with x86 musl toolchain due to
recent changes about sha1 and sha156 hwaccel support in Busybox 1.36.0.

From Alpinelinux [1]:
"main/busybox: disable sha hwaccel
 the flag check for this seems incorrect- it triggers sha_ni use when
 the instructions aren't available, but avx512vl/bw is - Elly on irc

 causes failures in github actions, which have avx512 but no sha_no"

The flag check was supposed to be fixed upstream by commit [2].

But init still crash with the latest 1_36_stable (with backported patch)
and master branch...

The same workaround has been applied to openembedded-core [3], which
states that they also have the issue with glibc.

Disable hardware sha acceleration on x86 (not x86_64), to avoid the
issue.

Checked that qemu_x86_64_defconfig with musl for x86_64 for core2 boot
as expected with sha hwaccel enabled.

Fixes:
https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/4202276721

[1] https://git.alpinelinux.org/aports/commit/main/busybox?id=ae2cfdf6f6da3dc46ee09d8ceafa26921f6e058e
[2] https://git.busybox.net/busybox/commit/?id=bd76b75f72f717150b909e8c64edfda725cabe11
[3] https://github.com/openembedded/openembedded-core/commit/22f639d61127f4b82a79008c5305e44e090a3680

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/busybox/busybox.mk

@@ -276,6 +276,15 @@ define BUSYBOX_INSTALL_INDIVIDUAL_BINARIES
 endef
 endif
 
+# Disable SHA1 and SHA256 HWACCEL to avoid segfault in init
+# with some x86 toolchains (mostly musl?).
+ifeq ($(BR2_i386),y)
+define BUSYBOX_MUSL_DISABLE_SHA_HWACCEL
+	$(call KCONFIG_DISABLE_OPT,CONFIG_SHA1_HWACCEL)
+	$(call KCONFIG_DISABLE_OPT,CONFIG_SHA256_HWACCEL)
+endef
+endif
+
 # Only install our logging scripts if no other package does it.
 ifeq ($(BR2_PACKAGE_SYSKLOGD)$(BR2_PACKAGE_RSYSLOG)$(BR2_PACKAGE_SYSLOG_NG),)
 define BUSYBOX_INSTALL_LOGGING_SCRIPT
@@ -364,6 +373,7 @@ endef
 BUSYBOX_TARGET_FINALIZE_HOOKS += BUSYBOX_INSTALL_ADD_TO_SHELLS
 
 define BUSYBOX_KCONFIG_FIXUP_CMDS
+	$(BUSYBOX_MUSL_DISABLE_SHA_HWACCEL)
 	$(BUSYBOX_SET_MMU)
 	$(BUSYBOX_PREFER_STATIC)
 	$(BUSYBOX_SET_MDEV)