Reduce messages from libjpeg-turbo

output_message():
By overriding output_message, we can use SkCodecPrintf,
which we can turn on or off.

The default turbo implementation of emit_message calls
output_message when it wants to print a message, so,
even though we don't override emit_message, it also uses
SkCodecPrintf.

emit_message():
Use libjpeg-turbo’s default implementation of emit_message.

It does not print "trace messages" which essentially are info
messages and it only prints the first warning (unless it a very
serious warning).

Currently, we just print everything, which is why the output
has been so verbose.

BUG=skia:

Review URL: https://codereview.chromium.org/1427523007

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