add asm sending for missing symbols
fix test_fgetc_ungetc
increase logging output, fixes s_0_0.test_safe_heap
Merge branch 'incoming'
Ensure the linker pulls in static libraries containing exported functions.

Previously, an exported function contained in a library would not be found by
the linker if the library did not contain symbols transitively reachable from
main.
Add Nick Bray to authors.
Merge branch 'link_exports' of github.com:ncbray/emscripten into incoming