This adds support for ARM/Thumb2 (Cortex-M) architecture, tested with
BOARD=qemu_cortex_m3 (i.e. QEMU with Cortex-M emulation). Should also
ease porting to other architectures supported by Zephyr.
This uses method of passing external libraries and link options into a
Zephyr application using ALL_LIBS and LDFLAGS_zephyr make variables, as
suggested by the Zephyr developers:
https://gerrit.zephyrproject.org/r/#/c/2476/ , and makes sure to append
to them, instead of assigning, to not overwrite important target-specific
options set by the Zephyr core.
JerryScript-DCO-1.0-Signed-off-by: Paul Sokolovsky [email protected]