make clean without OS ARCH except android platform
py improvement according to Martin's sugesstion
improve py
improve py
improve py, and change mk according to mk
improve py
improve py and mk
Merge pull request #1355 from syureyi/clean

Clean
Fix build warnings with gcc in EncodeDecodeTest

Avoid a comparison between signed and unsigned integers, and avoid
a warning about a variable which is set but not used.
Remove an unused macro
Use the correct version of delete within a unit test

This fixes valgrind warnings when running this test. The mismatched
delete could also potentially have caused memory corruption issues
while running the tests.
Make sure uiIDRPicId is initialized within EncodeDecodeTest

This fixes valgrind warnings about comparison with uninitialized
values.
Merge pull request #1357 from mstorsjo/silence-warnings

Fix build warnings with gcc in EncodeDecodeTest
Merge pull request #1358 from mstorsjo/remove-unused-macro

Remove an unused macro
Merge pull request #1360 from mstorsjo/use-correct-delete

Use the correct version of delete within a unit test
Merge pull request #1361 from mstorsjo/avoid-comparing-uninitialized

Make sure uiIDRPicId is initialized within EncodeDecodeTest