* Fix sgx porting issues: incorrect compilation flags, porting function impl, document, etc. * Update bh_platform.c Add check for function bh_vprintf_sgx: check whether print_function is not NULL.
Change emcc to clang Refine interpreter to improve perforamnce
With agreement from contributors.
And add asm code of em64/arm/mips version to call native wrapper functions; Fix some issues of calling wrapper functions;
