1. In drivers/Timer.cpp make sure that hardware timer is initialized outside of critical section.
This is because on PSoC 6 hardware resources are shared between both cores
and we have to make sure that the other core is not already using a particular resource.
This mechanism is based on interprocessor communication taht cannot be handled iside of
critical section.
2. Added support for post-binary hook function for PSoC 6 targets, so the hex image for M0+ CPU core
can be merged with M4 core image for the final image.
3. Added possibility to use hook function from exportes, so the M0+ hex image could be included
in the generated project.
4. Included hex images in the build dependency list, so the update of image is catched by the
build process.