The model introduced in patch 2 is now arch-agnostic, and all arch-es
are being switched at least partly (to at least give examples of how
things will look like).

1: common: move a few macros out of xen/lib.h
2: common: assembly entry point type/size annotations
3: x86: annotate entry points with type and size
4: x86: also mark assembler globals hidden
5: Arm: annotate entry points with type and size
6: RISC-V: annotate entry points with type and size
7: PPC: switch entry point annotations to common model
8: tools/binfile: switch to common annotations model

Jan