tpm2_rsaencrypt: fix file argument
tpm2_rsaencrypt: fix file argument

Based on argument ordering and getopt handling, the code was getting lucky and
actually properly grabing the input file at argv[1]. However, the first
item in the array is really argv[0].

A result could be that the input file is NULL, which means read data
from stdin and the tool will hang.

Fixes: #664

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