Enabler: add transformations that replace more stdio having an implicit locking mechanism

[thhuang]

• Since we will handle the synchronization manually, using the unlocked version of stdio functions are safe without acquiring and releasing locks for files in runtime.
• References:
  • https://github.com/arcana-lab/noelle/pull/82
  • https://www.gnu.org/software/gnulib/manual/html_node/
• stdio functions that the IO Enabler will handle:
  • getc
  • getcchar
  • putc
  • putchar
  • clearerr
  • feof
  • ferror
  • fflush
  • fgetc
  • fgets
  • fileno
  • fputc
  • fputs
  • fread
  • fwrite
  • fgetwc
  • fgetws
  • fputwc
  • fputws
  • getwc
  • getwchar
  • putwc
  • putwchar