Rewrite meson.build

[wrvsrx]

This rewriting make three changes:

1. This project compiled by meson used to produce an empty .a file.
   This should not happen since lyra is pure header library.
2. Now meson can correctly install these header files.
3. Now lyra.pc file is automatically created by meson.

[grafikrobot]

1. The meson build file is generated from the regular B2 build files: https://github.com/bfgroup/Lyra/blob/develop/data/build.jam
2. Why does this need to be two files?

[wrvsrx]

1. Sorry for my negligence, I'll change this PR to use the B2 build file for generating meson.build.
2. I use two meson.build files to use meson's preseve_path feature, since it can simplify some logics. I can use only single file if you don't want that.

[wrvsrx]

I make changes to data/build.jam and regenerate meson.build.

[wrvsrx]

It seems the mingw-related errors in the test have nothing to do with this PR.