Makefile builds: memory-analyzer requires linking.dir

With the undeclared build dependency, parallel builds would sometimes
fail, depending on the exact time the subdirectories completed their
build steps. Avoid this problem by properly declaring the dependency.

Author: tautschnig

src/Makefile

@@ -87,7 +87,8 @@ goto-diff.dir: languages goto-programs.dir pointer-analysis.dir \
 
 goto-cc.dir: languages goto-programs.dir linking.dir
 
-memory-analyzer.dir: util.dir goto-programs.dir ansi-c.dir
+memory-analyzer.dir: util.dir goto-programs.dir langapi.dir linking.dir \
+	                   ansi-c.dir
 
 symtab2gb.dir: util.dir goto-programs.dir langapi.dir linking.dir \
                json.dir json-symtab-language.dir