Added documentation for -X command line switch which allows the user to specify the desired error reporting output format.
Added documentation for -X command line switch which allows the user to
specify the desired error reporting output format.

techkey/nasm,techkey/nasm,turingstudio/nasm,turingstudio/nasm,projedi/nasm,projedi/nasm,projedi/nasm,Distrotech/nasm,letolabs/nasm,projedi/nasm,techkey/nasm,techkey/nasm,Distrotech/nasm,letolabs/nasm,turingstudio/nasm,projedi/nasm,letolabs/nasm,Distrotech/nasm,techkey/nasm,turingstudio/nasm,Distrotech/nasm