add grffile to the basic latex template

IPython/nbconvert/templates/latex/latex_basic.tplx

@@ -144,6 +144,7 b' unknown type ((( cell.type )))'
 \usepackage{amsmath}
 \usepackage{amssymb}
 \usepackage{graphicx}
+\usepackage{grffile}
 \usepackage{ucs}
 \usepackage[utf8x]{inputenc}