LibJS: Enable EXPLICIT_SYMBOL_EXPORT

Author: https://github.com/ayeteadoe
Commit: c14173f651
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5215
Reviewed-by: https://github.com/ADKaster ✅

Libraries/LibJS/Bytecode/Executable.h

@@ -47,7 +47,7 @@ struct SourceRecord {
     u32 source_end_offset {};
 };
 
-class Executable final : public Cell {
+class JS_API Executable final : public Cell {
     GC_CELL(Executable, Cell);
     GC_DECLARE_ALLOCATOR(Executable);