rusEfi is trying to use latest stable ChibiOS with minimal changes

At the moment rusEfi custom version of ChibiOS has the following changes:

1) LSE auto-detection, see rusefi_lse_fix.h see LSE_TIMEOUT

2) Changed "STM32_ADC_ADC2_DMA_STREAM" in demos/STM32/RT-STM32F334R8-NUCLEO/mcuconf.h

3) Uncommented "ASMXOBJS" support in os/common/ports/ARMCMx/compilers/GCC/rules.mk

5) Support for half/timeout-ISR for UART-DMA in /os/hal/include/uart.h and os/hal/ports/STM32/LLD/USARTv1/uart_lld.*

6) Changes around "FLOAT_PRECISION" and ftoa() in os/hal/lib/streams/chprintf.c

8) Use local "struct tm *t" in os/hal/ports/STM32/LLD/RTCv1/rtc_lld.c

11) Fixes for UART4-UART8, USART_ISR_* flags USART_CR1_M in os/hal/ports/STM32/LLD/USARTv2/serial_lld.c and os/hal/ports/STM32/LLD/USARTv2/uart_lld.c

13) ON_LOCK_HOOK fix in os/rt/include/chdebug.h

14) Use chSysHalt() instead of chDbgStackOverflowPanic() in os/rt/ports/ARM/chcore.h

15) Use QueryPerformanceCounter() instead of POSIX gettimeofday() in os/rt/ports/SIMIA32/chcore.c

16) Change chSysHalt() and remove maxNesting in os/rt/src/chdebug.c

New files: 
	os/common/startup/SIMIA32/compilers/GCC/rules.mk
	os/hal/ports/STM32/LLD/RTCv2/rusefi_lse_fix.h
	os/hal/ports/simulator/posix/*