src/install: replace g_print calls by log functions
src/install: replace g_print calls by log functions

These are a very few remnants of g_print usage in library functions.
We use g_print only for emitting desired program output for the user, not
for log messages etc.

Signed-off-by: Enrico Joerns <a2e5f936c390f36494e46e71bcfbe365bb1e8c49@pengutronix.de>

rauc/rauc,ejoerns/rauc,jluebbe/rauc,ejoerns/rauc,ejoerns/rauc,jluebbe/rauc,rauc/rauc,jluebbe/rauc,rauc/rauc