testfiles for extension fix

closes #504

testfiles/fontload-ext.luatex.tlg

@@ -0,0 +1,14 @@
+This is a generated file for the l3build validation system.
+Don't change this file in any respect.
+TU/texgyrepagella-regular.otf(0)/m/n:
+  [texgyrepagella-regular.otf]:mode=node;script=latn;language=dflt;+tlig;
+TU/XX(0)/m/n:
+  [texgyrepagella-regular.otf]:mode=node;script=latn;language=dflt;+tlig;
+TU/XX(0)/m/it:
+  [texgyrepagella-italic.otf]:mode=node;script=latn;language=dflt;+tlig;
+TU/YY(0)/m/n:
+  [texgyrepagella-regular.otf]:mode=node;script=latn;language=dflt;+tlig;
+TU/YY(0)/m/it:
+  [texgyrepagella-italic.otf]:mode=node;script=latn;language=dflt;+tlig;
+***************
+Compilation 1 of test file completed with exit status 0

testfiles/fontload-ext.lvt

@@ -0,0 +1,30 @@
+
+\input{fontspec-testsetup.tex}
+
+\usepackage{fontspec}
+
+\begin{document}
+
+\setmainfont{texgyrepagella-regular.otf}
+hello \CURRNFSS
+
+\setmainfont{XX}[
+  Extension = .otf ,
+  UprightFont    = texgyrepagella-regular    ,
+  BoldFont       = texgyrepagella-bold       ,
+  ItalicFont     = texgyrepagella-italic     ,
+  BoldItalicFont = texgyrepagella-bolditalic ,
+]
+hello \CURRNFSS
+\emph{hello \CURRNFSS}
+
+\setmainfont{YY}[
+  UprightFont    = texgyrepagella-regular.otf    ,
+  BoldFont       = texgyrepagella-bold.otf       ,
+  ItalicFont     = texgyrepagella-italic.otf     ,
+  BoldItalicFont = texgyrepagella-bolditalic.otf ,
+]
+hello \CURRNFSS
+\emph{hello \CURRNFSS}
+
+\end{document}

testfiles/fontload-ext.tlg

@@ -0,0 +1,14 @@
+This is a generated file for the l3build validation system.
+Don't change this file in any respect.
+TU/texgyrepagella-regular.otf(0)/m/n:
+  "[texgyrepagella-regular.otf]/OT:script=latn;language=dflt;mapping=tex-text;" at 10.0pt
+TU/XX(0)/m/n:
+  "[texgyrepagella-regular.otf]/OT:script=latn;language=dflt;mapping=tex-text;" at 10.0pt
+TU/XX(0)/m/it:
+  "[texgyrepagella-italic.otf]/OT:script=latn;language=dflt;mapping=tex-text;" at 10.0pt
+TU/YY(0)/m/n:
+  "[texgyrepagella-regular.otf]/OT:script=latn;language=dflt;mapping=tex-text;" at 10.0pt
+TU/YY(0)/m/it:
+  "[texgyrepagella-italic.otf]/OT:script=latn;language=dflt;mapping=tex-text;" at 10.0pt
+***************
+Compilation 1 of test file completed with exit status 0