configs/avenger96_defconfig: linux build needs host-openssl

Fixes the gitlab build:
https://gitlab.com/buildroot.org/buildroot/-/jobs/1019385566/

  HOSTCC  scripts/extract-cert
scripts/extract-cert.c:21:25: fatal error: openssl/bio.h: No such file or directory

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

configs/avenger96_defconfig

@@ -10,6 +10,7 @@ BR2_LINUX_KERNEL_DEFCONFIG="multi_v7"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="stm32mp157a-dhcor-avenger96"
 BR2_LINUX_KERNEL_INSTALL_TARGET=y
+BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
 BR2_TARGET_ROOTFS_EXT2=y
 BR2_TARGET_ROOTFS_EXT2_4=y
 BR2_TARGET_ROOTFS_EXT2_SIZE="120M"