When converting from lsb 10 bit formats to msb, the values
need to be shifted to the top 10 bits.  Using a multiply
allows the different numbers of bits to be copied:
// 128 = 9 bits
// 64 = 10 bits
// 16 = 12 bits
// 1 = 16 bits
Bug: libyuv:751
Test: LibYUVPlanarTest.MultiplyRow_16_Opt
Change-Id: I9cf226053a164baa14155215cb175065b1c4f169
Reviewed-on: https://chromium-review.googlesource.com/762951Reviewed-by: richard winterton <rrwinterton@gmail.com>
Reviewed-by: Frank Barchard <fbarchard@google.com>
Commit-Queue: Frank Barchard <fbarchard@google.com>