gpsd/valgrind-suppressions

# Suppress known C library errors in valgrind.
# This is good under gcc 3.4.2, glibc 2.3.4, using -g and -O2
{
   suppress1
   Memcheck:Cond
   fun:strlen
   fun:vsnprintf
   fun:gpsd_log
   fun:main
}
{
   suppress2
   Memcheck:Value8
   fun:vfprintf
   fun:vsnprintf
   fun:gpsd_log
   fun:sirf_parse
   fun:sirfbin_parse_input
   fun:gpsd_poll
   fun:main
}