tests/sys/geom build warning fixes

[aprieger_llnw.com]

Summary

tests/sys/geom build warning fixes

[aprieger_llnw.com]

Changelog:
Pre-fix warnings are at: https://gist.github.com/aprieger-llnw/3fda4ad7d4d0e1a11f6625f796fe8a80

1. sys/geom/eli/pkcs5v2.c
   • Warnings:
     • warning: passing 'const char *' to parameter of type 'const uint8_t *' (aka 'const unsigned char *') converts between pointers to integer types with different sign [-Wpointer-sign]
     • warning: passing 'uint8_t [11]' to parameter of type 'const char *' converts between pointers to integer types with different sign [-Wpointer-sign]
   • Fixes:
     • added the explicit modifier "const uint8_t *" to parameter "passphrase" to prepare it for the function on line 72
     • added the explicit modifier "const char *" to parameter "passphrase" to prepare it for the function on line 103

[sbruno]

Instead of casting to const char *, can you investigate actually changing and/or making the variable type consistent (either const char [] or const uint8_t [])?

[aprieger_llnw.com]

• tests/sys/geom build warning fixes
• tests/sys/geom revision update
  
  Needed to change the variable to const char [], because the change to uint8_t [] would need to cause strcmp to be changed

[sbruno]

Should be cosmetic and cleans up warnings only.