New ports for true-embedded developers :)

[Lev Serebryakov]

Hello, Freebsd-embedded.

 I've committed some new ports:

devel/gcc-arm-embedded
devel/libopencm3
devel/lm4tools
devel/stlink

 This set (and devel/openocd) allows to develop bare-metal code for
Cortex-Mx-based microcontrollers with same tools as Linux/Windows/MacOS X
users.

 I've checked lm4tools with TI/Stellaris TivaC Launchapd and stlink with
STM32F4-DISCOVERY boards.

-- 
// Black Lion AKA Lev Serebryakov <lev at FreeBSD.org>