Bring PAC version to 4.4.4

Change-Id: Ica9dd8f944ccbdaacfba266547345c99c841dd56
Bring threads to 4.4.4

Change-Id: I973ffbcdbf70b951e9951218686fa1ff27108acf
Fixes

Change-Id: I5c4a68080cedb31683447c09e5cb47ab814dfe87
Merge remote-tracking branch 'upstream/pac-4.4' into pac-4.4