Add Bartman's toolchain support

[tehKaiN]

• Create toolchain file for CMake
• Add support to ACE's CMakeLists file
• Add proper macros in ace/types.h
• Implement or get rid of missing stdlib fns
  • printf etc.
  • 8 filesystem fns - must be implemented using OS
  • 2 ctype fns for fixmath - taken from https://github.com/DeidaraC/ctype.h
  • exit()
  • 7 string.h fns
• Fix link errors
• Add support for Bartman's UAE logging
• Fix mini_std problems
• Fix include mess
• Add setup instructions to docs
• Figure out how to make UAE logging not put \n by itself, or emit \t chars in same print - moved to separate issue: Figure out how to make UAE logging not put \n by itself #128
• Add proper license info in repo for mini_std

[tehKaiN]

I asked Bartman if he can add libnix to his toolchain but it's low on his priority list. Related issue: BartmanAbyss/vscode-amiga-debug#5

There are around 21 fns which are missing. I've added printf-like fns from https://github.com/mpaland/printf which leaves us with 18 unimplemented ones:

• 8 filesystem fns - must be implemented using OS
• 2 ctype fns for fixmath
• exit()
• 7 string.h fns

[tehKaiN]

I'm getting some undefined reference to low level symbols:

undefined reference to `__muldi3'
undefined reference to `__clzsi2'
undefined reference to `__fixdfsi'
undefined reference to `__udivdi3'
undefined reference to `__ltdf2'
undefined reference to `__floatsidf'
undefined reference to `__muldf3'
undefined reference to `__subdf3'
undefined reference to `__adddf3'
undefined reference to `__divdf3'
undefined reference to `__gtdf2'
undefined reference to `__fixunsdfsi'
undefined reference to `__floatunsidf'
undefined reference to `__ledf2'
undefined reference to `__gedf2'
undefined reference to `__umoddi3'

no idea how to fix it yet

[tehKaiN]

Figure out how to make UAE logging not put \n by itself, or emit \t chars in same print

I asked Bartman to unify his debug interface with that of WinUAE 4.4.0. So it becomes a not completely related issue.

[tehKaiN]

I've currently merged Bartman branch to ptplayer since it's quite stable. I'll try to do remaining tasks tomorrow and close this issue.

[tehKaiN]

done!