Add Sad arm64 code
Add gnu assembler support.
Refine some code
Add unittest demo for android platform
not need
not need
update apk name
clear up TAP space
simplify stash pop bs
fix a bug that if..else are grouped incorrectly
Merge pull request #900 from ruil2/enc_warnings

fix a bug that if..else are grouped incorrectly
Merge pull request #898 from ruil2/enc_rc_4

simplify stash pop bs
remove macro NO_WAITING_AU for always on
Merge pull request #902 from huili2/remove_No_Waiting_Au

remove macro NO_WAITING_AU for always on
enable dynamic AU size in decoder
Merge pull request #903 from zhilwang/arm64-sad

Add Arm64 sad code
Merge pull request #901 from syureyi/androidut

Androidut
    clean up expand picture.
Unset the executable bit on source files
Remove stray " in android layout xml files