configs/olpc_xo175: needs host-openssl for kernel build

Fixes:

  https://gitlab.com/buildroot.org/buildroot/-/jobs/517918177

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

configs/olpc_xo175_defconfig

@@ -11,6 +11,7 @@ BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
 BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/olpc/xo-1.75/linux.config"
 BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/olpc/linux.config"
 BR2_LINUX_KERNEL_INSTALL_TARGET=y
+BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
 BR2_PACKAGE_LINUX_FIRMWARE=y
 BR2_PACKAGE_LINUX_FIRMWARE_LIBERTAS_SD8686_V8=y
 BR2_PACKAGE_LINUX_FIRMWARE_LIBERTAS_SD8686_V9=y