util/genprof: improve handling of command line arguments

Accept only one command line argument (the input file name); close input
stream both on error and on success; print more informative error messages
when files could not be opened.

Change-Id: Ib2f0622a332317d7a13f33f1e5787381804c43a9
Found-by: missing fclose()'s found by Cppcheck 1.65
Signed-off-by: Daniele Forsi <dforsi@gmail.com>
Reviewed-on: http://review.coreboot.org/6573
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
1 file changed