[RZ/A1H] commit for build system changes

- add CA9 category to build.py
- add library for RTX-CA9
- add target definition for RZ/A1H
- change some test related settings for RZ/A1H
- add gcc options for CA9
[RZ/A1H] commit for CMSIS changes

- adds CA9 related headers
- adds start up routine (only ARMCC is supported)
- adds scatter file for RZ/A1H
- adds GIC driver
- adds peripheral definitions(iodefine) for RZ/A1H
- adds serial flash boot loader for RZ/A1H
[RZ/A1H] commit for HAL changes

- adds GPIO driver
- adds I2C driver
- adds SPI driver
- adds PWM driver
- adds serial driver (irq not supported)
- adds ticker driver
- add analogin driver
[RZ/A1H] commit for RTOS changes

- adds RTX-CA related files
- changes Thread.cpp for CA9
- adds GR-PEACH entry to README.md
[RZ/A1H] fixs scatter file

There was two sections for sflash which lead to
separate output .bin file. Fixed.
[RZ/A1H] first release - change InterruptManager.cpp for CA9

RZ/A1H has GIC instead of NVIC. InterruptManger assumes
NVIC only, so temporarily ifdef guarded in order to pass
the compilation.