This is the wrong operator to use, which only seems to work because
`os.name` and `'nt'` happen to be the same object. Python 3.8 also
produces a `SyntaxWarning` when encountering this pattern.
On Linux, the library file is stored in the platform triplet directory under the
lib directory (hence for example
lib/x86_64-linux-gnu/gstreamer-1.0/libgstfoo.so) so the regex needs to take this
into account.
With this change the LD_LIBRARY_PATH on Linux now contains only the directories
with gst libs, ignoring the plugins, as initially intended in
c6613d8da2.
Fixes#56
At least in Meson 0.49, the target['install_name'] is a string, not a list, so
the heuristics declared in the is_library_target_and_not_plugin() can't apply
because Python is actually happy to iterate over a string without any warning.
In the case of wine, the env can not be uninstalled, also developers
do not necessiraly care about the fact that it is "uninstalled", the
important thing is that it is a development environment, meaning
that they can work on GStreamer or with GStreamer in the environment.
I still keep the `uninstalled` target to avoid changing people's
habits for now.
