Fix druntime/dmd "Edit this Page" paths (#3567)

Co-authored-by: ryuukk <[email protected]>

Author: WebFreak001

dpl-docs/views/layout.dt

@@ -173,9 +173,9 @@ html(lang='en-US')
             - string path_prefix, line_suffix, filename;
             - if( modname )
               - if( modname.startsWith("core.") || modname.startsWith("object"))
-                - project = "druntime", path_prefix = "src/";
+                - project = "dmd", path_prefix = "druntime/src/";
               - else if( modname.startsWith("dmd.") )
-                - project = "dmd", path_prefix = "src/";
+                - project = "dmd", path_prefix = "compiler/src/";
               - else
                 - project = "phobos", path_prefix = "";
               - if (info.docGroups.length >= 1 && !noExactSourceCodeLinks)