SDL2: regenerate configure script.

* I made changes to configure.in, but for this to work configure needs
to be regenerated.

media-libs/libsdl2/libsdl2-2.0.1.recipe

@@ -8,7 +8,7 @@ emulators, and popular games.
 HOMEPAGE="http://www.libsdl.org/"
 SRC_URI="http://www.libsdl.org/release/SDL2-2.0.1.tar.gz"
 CHECKSUM_SHA256="0ae7e902a26777614a011fe7053ca7e8b14843db3c42ca117564d208cf6732f0"
-REVISION="3"
+REVISION="4"
 LICENSE="Zlib"
 COPYRIGHT="1997-2013 Sam Lantinga"
 
@@ -20,7 +20,7 @@ PROVIDES="
 	cmd:sdl2_config = $portVersion
 	lib:libSDL2$secondaryArchSuffix = 2.0_0.1.0 compat >= 2.0_0.0
 	lib:libSDL2_2.0$secondaryArchSuffix = 0.1.0 compat >= 0.0
-	lib:libSDL2_2.0.1$secondaryArchSuufix = 0.1.0 compat >= 0.0
+	lib:libSDL2_2.0.1$secondaryArchSuffix = 0.1.0 compat >= 0.0
 	"
 
 REQUIRES="
@@ -30,6 +30,7 @@ REQUIRES="
 	lib:libpng$secondaryArchSuffix
 	lib:libjpeg$secondaryArchSuffix
 	lib:libtiff$secondaryArchSuffix
+	lib:libltdl$secondaryArchSuffix
 	"
 
 BUILD_REQUIRES="
@@ -48,6 +49,7 @@ BUILD_PREREQUIRES="
 	cmd:make
 	cmd:gcc$secondaryArchSuffix
 	cmd:ld$secondaryArchSuffix
+	cmd:which
 	"
 
 SOURCE_DIR="SDL2-$portVersion"
@@ -56,6 +58,7 @@ PATCHES="libsdl2-2.0.1.patchset"
 
 BUILD()
 {
+	sh autogen.sh
 	runConfigure ./configure
 	make $jobArgs
 }