The gray-on-black color code used for debug level print-out in
mbed_trace is hard to read. Bright-blue-on-black increases the
brightness of the text without over shadowing the info level
default (white-on-black), thus making it easier to read while
maintaining the original intention.
For original color set MBED_TRACE_COLOR_THEME to 1.
mbed-os consists of mbed-core and mbed-rtos
mbed-baremetal consists of mbed-core
The main change is for mbed-core. Changing from object library to be interface. This way it allows us to do the above to have 2 main targets for users to use.
This should be backward compatible change as mbed-os target we used contains the same files/options as previously set.