meson: Do not hardcode default_library=static

During the build, the default library can be overridden via the
-Ddefault_library=type flag.

Presetting this key in meson.build makes life harder for distributions
which almost always want to build shared libraries. Those requiring
static libraries can always force that via the aforementioned flag.

Signed-off-by: Zurab Kvachadze <zurabid2016@gmail.com>

Author: BalkanMadman

meson.build

@@ -5,7 +5,6 @@ project(
   default_options: [
     'c_std=gnu11,c11',
     'warning_level=3',
-    'default_library=static',
   ],
   license: 'MIT',
   license_files: 'LICENSE',