feat(core): add uae4all core for rpi1 & 0

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Please make sure your Merge Request is ready to be merged:

• a line describing your modifications has been added to CHANGELOG.md
• a line describing tests to make before release has been added to TESTING.md
• if the Merge Request is about a new feature, an improvement or an important bugfix, amend RELEASE-NOTES.md
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Changes :

• Add Amiga support for Raspberry Pi Zero and one through new uae4all core

This core is based on uae4all 1 which is highly optimized but compatibility is low. Only OCS amiga supported (no AGA). No hdf or whdload support. Support adf, adz (gzip compressed adf) and uae config file (but only floppy0 & floppy1 entries). This core can be compiled with 2 different 68000 emulation core: either cyclone in ARM ASM or FAME in C and X86 ASM. FAME has higher compatibility but Flower (default game available in recalbox) only works with cyclone. Having both in recalbox could be an improvement ...