add fontawesome acceptance test for xelatex

test/acceptance/fixtures/examples/fontawesome_xelatex/main.tex

@@ -0,0 +1,12 @@
+\documentclass{article}
+\usepackage{fontawesome}
+
+\begin{document}
+Cloud \faCloud
+
+Cog \faCog
+
+Database \faDatabase
+
+Leaf \faLeaf
+\end{document}

test/acceptance/fixtures/examples/fontawesome_xelatex/options.json

@@ -0,0 +1,3 @@
+{
+	"compiler": "xelatex"
+}