Update meson and cmake config to only include openrtx and platform paths.
Update files to use <..> for system and external libraries, ".." for
project files and new relative paths as necessary.
Did not attempt to fix areas where includes that should be <..> were
previously ".."
Inspired by #96, closes#359.
Acked-by: Silvano Seva <silseva@fastwebnet.it>
On CKS32F407 the external trigger source for a DAC channel needs to be disabled
in order for the writes to the DAC data registers to be effective. This is
coherent with the STM32F4 reference manual, but the STM32 devices update the DAC
output on a register write wether the external trigger is enabled or not.