configs/beaglebone_qt5_defconfig: kernel builds needs host-openssl

configs/beaglebone_qt5_defconfig: kernel builds needs host-openssl

Similar to the fix for the base beaglebone defconfig in commit 38912a61be
(configs/beaglebone: kernel builds needs host-openssl), the qt5 variant uses
the same kernel, so also needs host-openssl.

Fixes:

914 scripts/extract-cert.c:21:25: fatal error: openssl/bio.h: No such file or directory
915  #include <openssl/bio.h>

https://gitlab.com/buildroot.org/buildroot/-/jobs/451176891

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>