Patch #1180012: add documentation for modulefinder

Doc/lib/lib.tex

@@ -93,6 +93,7 @@ and how to embed it in other applications.
 \input{libimp}
 \input{libzipimport}
 \input{libpkgutil}
+\input{libmodulefinder}
 \input{libcode}
 \input{libcodeop}
 \input{libpprint}