Compatible with Android S

Merge pull request #18 from alibaba/develop

Compatible with Android S, probably the last version.

Added support for ColorOS12

Added support for ColorOS12

fix : may crash during log dump, because new logs may be written at the same time.

fix : may crash during log dump, because new logs may be written at the same time.

Probabilistic double free when multi-thread callback signal handler.

fix :

1. Probabilistic double free when multi-thread callback signal handler.
2. Log buffer will be clean when init failed.

First release

Merge pull request #5 from alibaba/develop

first release & add demo apk.