link: add .eh_frame section for amd64/arm64 ELF binaries

[madCdan]

Fixes #47166

For ELF binaries, add dwarf .eh_frame section with specific dwarf opcodes for runtime.asmcgocall.
When using cgo, this is needed to have a complete backtrace when the C code crashes ; otherwise, the backtrace stops at runtime.asmcgocall. This is due to the fact that runtime.asmcgocall switches the stack (Go stack <-> system stack).

The dwarf opcode for runtime.asmcgocall might probably be optimized.

Please note, even if the initial problem was on Android, this fixes should work on the other platforms supporting ELF binaries (tested successfully on Linux/amd64).

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