run amd64 binaries on RK3588 without emulating library calls

 Using DynaRec on arm64, box64 will dynamically recompile x64_64 code to
 aarch64 but will also translate calls to foreign library functions to
 native library calls. This usually makes amd64 executables run via
 box64 much faster than emulating amd64 on arm64 via qemu which will
 emulate everything down to the C library. For example OpenArena emulated
 with box64 will be at about 85% of its native speed.
 .
 This package is optimized with -mcpu=cortex-a76.cortex-a55+crypto and
 built with workaround for incoherent si_info on SIGSEGV.