goldfish: bump emulator to 6459688

Include hwcodec fix on the host

Bug: 155191175
Test: presubmit
Change-Id: I6bf78d309d50c592f652b0fb20b9d0ac3ae2196a
Merged-In: I6bf78d309d50c592f652b0fb20b9d0ac3ae2196a
Signed-off-by: Roman Kiryanov <rkir@google.com>
1 file changed