run a sanity check after clearing the cache
Ensure that fileno() returns -1 when given an invalid file pointer.
check sanity on emcc -v
run sanity checks on emcc -v even without inputs
pass NO_EXIT_RUNTIME flag to fastcomp and add test
Merge pull request #2157 from rfk/rfk/fileno-error-reporting

Ensure that fileno() returns -1 when given an invalid file pointer.
use le32 target in slow2[asm].test_sqlite; fixes #2160
improve -v output, and add some docs
Merge branch 'incoming' of https://github.com/kripken/emscripten into incoming