* Added simulator support for Mac.
* Fix for simulator to properly assemble wolfboot.bin + signedtestapp + update + swap.
* Fixes for handling 64-bit assigned mmap virtual addresses. Added hal_flash_write and hal_flash_erase support for 64-bit address using uintptr_t. Enabled if platform is 64-bit and `FORCE_32BIT` is not defined
* Fix simulator conflict with src/libwolfboot.o object in test-app.
* Cleanup test-app linker flags.
- internal flash now mapped at 0xC0000000 (using `ARCH_FLASH_OFFSET`)
- wolfBoot binary included in internal flash (wolfboot partition is also
now writeable to test self-updates and encryption)
- sim test app supports encryption (sets the key for test)
- added new target to store the update in the external flash
- external flash mapped to 0xD0000000
David Garske
Daniele Lacamera