package/qemu: bump to 5.0.0

Remove upstream patches [1][2].

Switch to libcap-ng for virtio support [3].

Remove bluez option [4].

Disable container build [5] since we don't want to use containers for cross-building.

Disable io_uring [6] since there is no such package in Buildroot (yet).

The ARM Cortex-m7 cpu is now supported [7] a defconfig can be added in follup patch.

[1] https://git.qemu.org/?p=qemu.git;a=commit;h=00b5032eaddb7193f03f0a28b10286244d2e2a7b
[2] https://git.qemu.org/?p=qemu.git;a=commit;h=21bf9b06cb6d07c6cc437dfd47b47b28c2bb79db
[3] https://git.qemu.org/?p=qemu.git;a=commit;h=7e46261368d129c5ee8be927f5bcadc7ecd800d7
[4] https://git.qemu.org/?p=qemu.git;a=commit;h=1d4ffe8dc77cbc9aafe8bcf514ca0e43f85aaae3
[5] https://git.qemu.org/?p=qemu.git;a=commit;h=afc3a8f9f1df09c091f9903eaef82b35c152cacf
[6] https://git.qemu.org/?p=qemu.git;a=commit;h=c10dd8565defdb14695580c9369b20f4544e65a2
[7] https://git.qemu.org/?p=qemu.git;a=commit;h=cf7beda5072e106ddce875c1996446540c5fe239

See:
https://wiki.qemu.org/ChangeLog/5.0
https://www.qemu.org/2020/04/29/qemu-5-0-0/



Signed-off-by: Romain Naour <romain.naour@gmail.com>
Cc: Adam Duskett <aduskett@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>