* Made it a bit easier to cross-compile for x86-64 or i686 on an AArch64
Windows system.
* Choose the default native recompiler back-end based on predefined
macros rather than requiring the build scripts to set it.
* Don't require every target without a native recompiler to declare
this.
* Got rid of the code that was supposed to set -m32 or -m64 when
building GENie (it didn't work - it tried to use ARCHITECTURE before
setting it).
* Avoid relying on the unreliable PROCESSOR_ARCHITECTURE environment
variable.
* Got rid of stuff for versions of Xcode that are definitely no longer
supported.
* Got rid of workarounds for very old Linux distros.
* Use newer makefile syntax for if/else/if structures, comment some else
and endif statements for clarity.
* Updated to GENie 1181.
* Applied local fix for GENie resource include directory bug, sent upstream as bkaradzic/GENie#572.
* Set MSVC flags to use conformant preprocessor, standards conformance mode, and assume UTF-8 encoding.
* Removed SDL2 source.
* Updated gradle.
* Updated SDL2 Java support glue code.
* Increased minimum supported Android API version to 24.
* Updated required asset files for Android app.
* Added proper tag for Android logging.
* Added SDL2 hint to make BGFX work on Android.
