[lucetc] Use -shared linker flag on BSD platforms

Author: valpackett

lucetc/src/lib.rs

@@ -395,7 +395,9 @@ fn ldflags_default(target: &Triple) -> String {
     use target_lexicon::OperatingSystem;
 
     match target.operating_system {
-        OperatingSystem::Linux => "-shared",
+        OperatingSystem::Linux | OperatingSystem::Freebsd |
+        OperatingSystem::Dragonfly | OperatingSystem::Netbsd |
+        OperatingSystem::Openbsd => "-shared",
         OperatingSystem::Darwin | OperatingSystem::MacOSX { .. } => {
             "-dylib -dead_strip -export_dynamic -undefined dynamic_lookup"
         }