Fix input options handling dashes

[astrogeco]

Describe the bug
The "help" option is triggered by -help which only uses one dash. Full-word options should use double dashes.

To Reproduce
See code

if ((argc != 2) || (strncmp(argv[1], "-help", 100) == 0))
    {
        printf("\ncFE TS CRC calculator: \%s\n", CFE_TS_CRC_VERSION_STRING);
        printf("\nUsage: cfe_ts_crc [filename]\n");
        exit(0);
    }

Expected behavior
Use --help instead

Code snips
If applicable, add references to the software.

System observed on:
Source code

Additional context
None

Reporter Info
Gerardo E. Cruz-Ortiz, NASA-GSFC