- Fix again UEFI for mini package

- Drop one more undesirable Obsoletes/Provides. This should have
been a Conflicts. (There was already a Conflicts, and since
Conflicts go both ways, we won't need a second one.)

- No UEFI for systemd-mini

- Add 2 upstream patches to fix boo#949574 and bsc#932284
0001-Make-sure-the-mount-units-pulled-by-RequiresMountsFo.patch
0002-units-enable-waiting-for-unit-termination-in-certain.patch

- Disable systemd-boot on aarch64 since it fails to build.
Error while compiling src/boot/efi/util.o is:
usr/include/efi/aarch64/efibind.h:2:20: fatal error: stdint.h: No such file or directory

- Fix UEFI detection logic: basically we let configure.ac figure out
if UEFI is supported by the current build environment. No need to
clutter the spec file with a new conditionnal %has_efi.
- Provide systemd-bootx64.efi (aka gummiboot)

- Modify patch tty-ask-password-agent-on-console.patch to reflect
the changes done for pull request 1432

- Undo Obsoletes/Provides (from Aug 11), creates too big a cycle.
- Provide systemd-sysv-install program/link [bnc#948353]

- Fix again UEFI for mini package

- Drop one more undesirable Obsoletes/Provides. This should have