Change DbgHLPrintf to LogError(ER_WARNING, ... when source drops late
data.

Change-Id: Idcc7d5df1829b01873f6aa7d14ede23296b0b2d8
Add extra QCC_DbgHLPrintf for performance characterization.

Change-Id: I5cbb3ba2bd3bb16c6a1b134748e58d9967275ccd