Add SDL2.0.1-3742e768b536.

Note: using the same folder for future updates.

libs/SDL2/visualtest/docs/latex/make.bat

@@ -0,0 +1,25 @@
+del /s /f *.ps *.dvi *.aux *.toc *.idx *.ind *.ilg *.log *.out *.brf *.blg *.bbl refman.pdf
+
+pdflatex refman
+echo ----
+makeindex refman.idx
+echo ----
+pdflatex refman
+
+setlocal enabledelayedexpansion
+set count=5
+:repeat
+set content=X
+for /F "tokens=*" %%T in ( 'findstr /C:"Rerun LaTeX" refman.log' ) do set content="%%~T"
+if !content! == X for /F "tokens=*" %%T in ( 'findstr /C:"Rerun to get cross-references right" refman.log' ) do set content="%%~T"
+if !content! == X goto :skip
+set /a count-=1
+if !count! EQU 0 goto :skip
+
+echo ----
+pdflatex refman
+goto :repeat
+:skip
+endlocal
+makeindex refman.idx
+pdflatex refman