compiler/natives/src/runtime: Add noop implementation of CallersFrames.
compiler/natives/src/runtime: Add noop implementation of CallersFrames.

In Go 1.9, runtime.panicwrap uses CallersFrames. So it needs to be
implemented (as well as the types it uses). Create a noop implementation
for now to resolve an undeclared name error.

A more functioning implementation may be possible, and needs to be
investigated (see Caller implementation for inspiration).

Fixes:

	../src/runtime/error.go:136:12: undeclared name: CallersFrames

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