- Add more compilers - especially GCC on macOS and Clang.
- Add more architectures - especially RISC-V-64
- Move build outside of QEMU (use cross-compilation)
- Use qemu-user for test on target environment
- Add Android CI with APK artifacts

Found with pmd-cpd scanner. The new function could probably be named better.

Contribute to #68

Tidying up a data source bundle, that is embedded e.g. in iOS app

Contribute to #68

Reduce count of globals / externs that could be a file-local static
variables

Fixes #1232

Contribute to #68

compiledict.c is clean from global state now

```bash
nm -C -l -fbsd src/libespeak-ng/la-compiledict.o | grep -E ' b | B '
```

Contribute to #68

compiledata.c is clean from global state now

```bash
nm -C -l -fbsd src/libespeak-ng/la-compiledata.o | grep -E ' b | B '
```

Move a code that should be shared outside HAVE_SONIC_H ifdef.

That also simplifies prosody SSML tests (made by @sthibaul) by removing
unnecessary cases.

Ref: #1512 #1368

Fixes #1528 

Now, `klatt` and `breath`-enabled variants may be added to tests

Following #1512 

Ref: espeak-ng/espeak-ng-ios-app#34

I unfortunately have broken in-speech pauses by fixing ones that should
be constant-time.
This reverts such change and adds a compensation to SSML code.

This reverts commit 9f0b23f49e.

msan requires that we build all code with msan to avoid false positives.

msan requires that we build all code with msan to avoid false positives.