ffmpeg: add swr_set_compensation to interface
ActiveAE: use swr_set_compensation for changing resample ratio
[cosmetic] rename non-member var
[Fix][StringUtils] Prevent infinite loop or crash.

Example:

  std::string rep = "1";
  StringUtils::Replace(rep,"",""); //infinite loop
  StringUtils::Replace(rep,"","1"); //crash std::bad_alloc
Merge pull request #3255 from ace20022/fix_replace

[Fix][StringUtils] Prevent infinite loop or crash.
Merge pull request #3240 from FernetMenta/aefixes

ActiveAE: fix setting resample ratio
[droid] - allow to build android for x86 platforms
[droid] - adapt readme to reflect support of gcc 4.8 toolchains aswell and get rid of the x86 libc flaw we had in older ndk versions (crystax for example)
droid-x86 corrections