am 6026a514: Move JPEGSource.{cpp,h} into libstagefright.

Merge commit '6026a514248f0c603d0e8c4a3f542abab3fa1509' into eclair-plus-aosp

* commit '6026a514248f0c603d0e8c4a3f542abab3fa1509':
  Move JPEGSource.{cpp,h} into libstagefright.