add 16MHz resonator for stm32f4
[stm32][f4] ld file for f405x6
Fixed dma interrupt flag related definitions.
Synchronise linker scripts which are supposed to be identical

This also report bug fixes about data alignment and bss storage to EFM32 &
LM3S targets.

Note: removed chrysn copyright statement as the file is a verbatim copy of
previous files.
Add support for static constructors and destructors
Small improvements of using FLASH memory in STM32F1XX
Merge branch 'master' of https://github.com/millerd/libopencm3