fuzz: Add fuzzer for virtio-pmem

The fuzzer is focusing on the virtio-pmem code that processes guest
inputs (e.g. virt queues). Given 'flush' is the only virtio-pmem
request, the fuzzer is essentially testing the code for parsing and
error handling.

Signed-off-by: Bo Chen <chen.bo@intel.com>

fuzz/Cargo.toml

@@ -57,6 +57,12 @@ path = "fuzz_targets/http_api.rs"
 test = false
 doc = false
 
+[[bin]]
+name = "pmem"
+path = "fuzz_targets/pmem.rs"
+test = false
+doc = false
+
 [[bin]]
 name = "qcow"
 path = "fuzz_targets/qcow.rs"