build-bootstraps: bump to 0.2.0

[truboxl]

Part of an initiative from #8927

• add support building for ARM without Neon
• add support building additional packages first

Note that not all packages currently can be built without problems, notably ffmpeg and its deps. Have to delve deeper separately.

[truboxl]

CC @agnostic-apollo as well for review

[agnostic-apollo]

Seems fine otherwise from an overlook. This won't affect normal builds, so have you ensured that reversal with sed is working fine for you?

And ideally, version bump commit should be separate from code change commits themselves.

[Grimler91]

Maybe add a comment in the bootstrap script or ffmpeg and deps' build.sh that they cannot be built without neon. Does the build of those packages just fail, or do they give an error when run on device?

[truboxl]

Dropping the proposed support for Arm no Neon. I am unhappy with the results so far. Trying to add back support for no Neon arm arch is far more convoluted than I thought.

I cannot guarantee rebuilt C++ programs will work due to android/ndk#1672. Even if it's not C++, I cannot confidently say the packages work without any extra gotchas. The ROM I am running already have some sort of qemu to intercept SIGILLs and it doesn't always work. Python doesn't work without the qemu (have to inject with LD_PRELOAD). Now GDB depends on Python is just icing on the cake on dozens and dozens of compatibility issues to troubleshoot that keep piling up as time goes on.

Then there's the cleaning up. So far haven't found a good way to clean up after using sed. Too much assumptions.

Probably will set up a repo if there's really people out there wanting to use some packages on <1GB RAM slow cores tablets in 2022 that can't even play 720p video properly.

I will probably tidy up this PR and left with fixes in the coming days. Also a script to install bootstrap.zip, usable by /system/bin/sh. Rebuilding APK shouldn't be the only option of using bootstrap archives. Bonus for the ability to run 32bit environment on 64bit OS without having to use debug APKs.