add additional option set test
refine code
code refine
fix bug
fix pps caused death loop issue
Merge pull request #1335 from lyao2/fixppsbug

fix pps caused death loop issue
make clean without OS ARCH except android platform
remove unsupported lines in cfg to avoid misleading
    fix a LTR range problem when LTR num is larger than 2
remove unused lines
Merge pull request #1338 from sijchen/add_setoption

[Encoder] remove unsupported lines in cfg to avoid misleading
Merge pull request #1341 from sijchen/enable_ltr01

[Encoder] fix a LTR range problem when LTR num is larger than 2
update spatial picture when abnormal exit
disable EC SetOption
Merge pull request #1342 from ruil2/update_pic

update spatial picture when abnormal exit
Merge pull request #1343 from huili2/ec_disable_set

disable EC SetOption
using default value for LTR.
Merge pull request #1346 from ruil2/ltr_limit

using default value for LTR.
py improvement according to Martin's sugesstion
improve py