qemu-native: Add debugging when qemu fails with qemu_cpu_kick_thread

qemu-native: Add debugging when qemu fails with qemu_cpu_kick_thread

We are expecting some random failures in QEMU runs one of this is
related to qemu_cpu_kick_thread that ends on exit(1) on qemu.

To improve debug information add patch that prints the backtrace and
the status of qemu cpu.

[YOCTO #8143]

(From OE-Core rev: c9dd8fae8fd799f0f64328606904e047ed8ee9c3)

Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>