configs/bananapi_m64: needs host-openssl

The kernel configuration used by the bananapi_m64_defconfig needs
host-openssl, otherwise it fails to build with:

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

Fixes:

  https://gitlab.com/buildroot.org/buildroot/-/jobs/269139123

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

configs/bananapi_m64_defconfig

@@ -36,6 +36,7 @@ BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.0"
 BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG=y
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="allwinner/sun50i-a64-bananapi-m64"
+BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
 
 # Filesystem
 BR2_TARGET_GENERIC_ISSUE="Welcome to Bananapi M64"