trunk: removed some bashisms in Makefiles (merge needed)

git-svn-id: https://www.dynare.org/svn/dynare/trunk@2536 ac1d8469-bf42-47a9-8791-bf33cf982152

Makefile

@@ -3,4 +3,4 @@ preprocessor.pdf: preprocessor.tex expr.png expr-sharing.png matrices.png overvi
 	pdflatex preprocessor
 
 clean:
-	rm -f preprocessor.{pdf,toc,aux,log,nav,snm,vrb,out} *~
+	rm -f *.pdf *.toc *.aux *.log *.nav *.snm *.vrb *.out *~