Commit 7d3feda796591dc250938d52762c1b271ceab6e2

DRC 2017-12-15T16:45:25

BUILDING.md: Adjust Android recipes for NDK r16+ NDK r16b moved some things around, so modify the Android build recipes to take that into account while preserving compatibility with previous NDK releases. NOTE: the GCC 4.9 NDK toolchain is deprecated, so we will need to develop new Android build recipes for libjpeg-turbo 1.6 that use the Clang toolchain. Closes #196