passcrypt: Add -std=c99 -O2 to the compile flags
passcrypt: Add -std=c99 -O2 to the compile flags

This brings it more in line with the rest.

Signed-off-by: Andrew Clayton <02e0a999c50b1f88df7a8f5a04e1b76b35ea6a88@opentechlabs.co.uk>

ac000/receiptomatic