tpm2-header: drop endian.h usage
tpm2-header: drop endian.h usage

endian.h is notoriously not portable. Use string-bytes
routines instead.

Fixes: #262
Signed-off-by: William Roberts <60148e894dabf0b83bde1d460768794cd453c455@intel.com>

martinezjavier/tpm2-tools,martinezjavier/tpm2-tools,01org/tpm2.0-tools,martinezjavier/tpm2-tools,01org/tpm2.0-tools,01org/tpm2.0-tools,martinezjavier/tpm2-tools