Don't mark sceKernelExitThread() as an error.

Also, add some reporting and make the sceKernelCreateThread log message
shorter.
Trim the newline at the end of stdout output.

Makes the log a bit easier to read.
Don't warn sceUtility*Status() wrong dialog type.

Games do this on real firmware, and it's a lot of noise.
Merge pull request #1250 from unknownbrackets/log-minor

Minor logging changes + more reporting