Cap the number of fuzzed decoder packets to 200
Cap the number of fuzzed decoder packets to 200

The fuzzer figured out that 3 bytes is enough to fuzz a package.
2 bytes for packet length, and 1 byte of actual packet. A 20K test case
can generate > 6000 packets. It does not seem like efficient fuzzing.

This CL simply stops execution when 200 packets have been generated.
That corresponds to 4 seconds of 20 ms packets.

Bug: chromium:840115
Change-Id: Id2742a6f8021134bacd8a6e8c71b32f20c7f1086
Reviewed-on: https://webrtc-review.googlesource.com/88566
Reviewed-by: Alex Loiko <999d0b481e5703ad7006f0848e249f8b2c3f29bd@webrtc.org>
Commit-Queue: Sam Zackrisson <b1a93beadfe1d2f7f0106ee02b6ffcdc950aa103@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#24000}
ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc