Use LTC_ prefix for all libtomcrypt macros and preprocessor definitions #579
Description
libtomcrypt defines many macros and preprocessor definitions.
Some of them use a LTM_ prefix, but many of them don't.
For example, take a look at the tomcrypt_macros.h.
This can easily cause name collisions.
All macros and preprocessor definitions from libtomcrypt should therefore use a LTC_ prefix.