sysutils/uefi-edk2-qemu: update to edk2-stable201911
Update sysutils/uefi-edk2-qemu to the TianoCore EDK2 edk2-stable201911
Update python dependency to no longer use the obsolete python 2.7, but
instead require python 3.4 or newer.
Remove the openssl patch, since it's no longer needed.
Reviewed by: araujo, mikael
Approved by: araujo
Differential Revision: https://reviews.freebsd.org/D23466