message: Fixed typos in readme
diff: - As of now there is no distribution channel for Android for LibIndy. You have to build it manually.
  - Copy generated `libindy.a` file to whatever location you want
  - in android_build.sh update LD_LIBRARY_PATH with the directory of libindy.a
  -4) Run `install_toolchains.s`. You need to run this once to setup toolchains for android
  +4) Run `install_toolchains.sh`. You need to run this once to setup toolchains for android
  5) Run `android_build.sh aarm64` to build libvcx for aarm64 architecture.(Other architerctures will follow soon)
  -5) Tests are not working on OSX as of now.
  +5) Tests are not working on Android as of now.
  