arch-arm: Fix linking error in aapcs64 unittests

This is fixing the undefined reference exposed by our nightly
run [1] by including the arch/arm/regs/int.cc source (needed
for the IntRegClassOps::flatten implementation) plus
sim/cur_tick.cc

[1]: https://www.mail-archive.com/gem5-dev@gem5.org/msg43249.html

Change-Id: I51a616ca2ef513f0068e531ebee17172d68cc738
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/64611
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Richard Cooper <richard.cooper@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>
1 file changed