Switching branches in Ansible install

[acroucher]

Native Linux build may fail if the master branch is built, then switched to testing branch and re-built. The build process errors out because it cannot find the FSON library:

Fatal Error: Cannot open module file ‘fson.mod’ for reading at (1): No such file or directory

This occurs if the rebuild is done by re-executing the Ansible install, or if it is done manually using ninja directly.

If the branch is switched before the first build, it works ok.

[acroucher]

A workaround is to rebuild first Zofu and then FSON manually, in their subproject directories, and install them before doing the Waiwera build.

The appropriate prefix should be specified when configuring the build for these two libraries, e.g. meson build --prefix=/home/bob.