clamav_dbload_fuzzer.cpp and clamav_scanfile_fuzzer.cpp use __pid_t, which some
Apple systems do not define, and this causes a compilation error. This change
defines __pid_t as pid_t, which does exist on those systems and allows clamav
to build.
The fuzz targets that write a temp file currently use the same filename
every time. One of the users identified that if the tests are running
in parallel mode, many processes are accessing the same file.
This results in unstable input to the API being tested, where the file
may be overwritten as the function is being tested.
This commit fixes it by putting the fuzz process PID in the filenames
for the scanfile and dbload fuzz targets.
Resolves: https://github.com/Cisco-Talos/clamav/issues/432
Also fixed a CMake bug that built an extra fuzz target file that doesn't
serve any purpose.
Resolves: https://github.com/Cisco-Talos/clamav/issues/431
Enabled the metadata collection feature, scan heuristics, and all-match
mode when fuzzing in the interest of better code coverage.
Also remove deprecated STREAM command.
