Add scummvm recipe

recipes/scummvm/01_redox.patch

+diff -rupNw source-original/common/stream.cpp source/common/stream.cpp
+--- source-original/common/stream.cpp	2017-12-08 23:21:10.000000000 +0100
++++ source/common/stream.cpp	2018-11-28 00:36:53.474637267 +0100
+@@ -95,7 +95,7 @@ bool MemoryReadStream::seek(int32 offs,
+ 		break;
+ 	}
+ 	// Post-Condition
+-	assert(_pos <= _size);
++	//assert(_pos <= _size);
+ 
+ 	// Reset end-of-stream flag on a successful seek
+ 	_eos = false;
+diff -rupNw source-original/configure source/configure
+--- source-original/configure	2017-12-08 23:21:13.000000000 +0100
++++ source/configure	2018-11-28 00:35:33.000000000 +0100
+@@ -3610,7 +3610,7 @@ case $_host_os in
+ 	amigaos* | cygwin* | dreamcast | ds | gamecube | mingw* | n64 | ps2 | ps3 | psp2 | psp | wii | wince)
+ 		_posix=no
+ 		;;
+-	3ds | android | androidsdl | beos* | bsd* | darwin* | freebsd* | gnu* | gph-linux | haiku* | hpux* | iphone | ios7 | irix*| k*bsd*-gnu* | linux* | maemo | mint* | netbsd* | openbsd* | riscos | solaris* | sunos* | uclinux* | webos)
++	3ds | android | androidsdl | beos* | bsd* | darwin* | freebsd* | gnu* | gph-linux | haiku* | hpux* | iphone | ios7 | irix*| k*bsd*-gnu* | linux* | maemo | mint* | netbsd* | openbsd* | riscos | redox* | solaris* | sunos* | uclinux* | webos)
+ 		_posix=yes
+ 		;;
+ 	os2-emx*)

recipes/scummvm/recipe.sh

+VERSION=2.0.0
+TAR=https://www.scummvm.org/frs/scummvm/$VERSION/scummvm-$VERSION.tar.xz
+BUILD_DEPENDS=(sdl liborbital freetype zlib libpng)
+
+function recipe_version {
+    echo "$VERSION"
+    skip=1
+}
+
+function recipe_update {
+    echo "skipping update"
+    skip=1
+}
+
+function recipe_build {
+    wget -O config.sub http://git.savannah.gnu.org/cgit/config.git/plain/config.sub
+    sysroot="${PWD}/../sysroot"
+
+    ./configure \
+        --host=${HOST} \
+        --prefix='' \
+        --with-sdl-prefix="$sysroot" \
+        --with-freetype2-prefix="$sysroot" \
+        --with-png-prefix="$sysroot" \
+        --with-zlib-prefix="$sysroot" \
+        --disable-timidity \
+        --disable-mt32emu
+    make
+    skip=1
+}
+
+function recipe_test {
+    echo "skipping test"
+    skip=1
+}
+
+function recipe_clean {
+    make clean
+    skip=1
+}
+
+function recipe_stage {
+    dest="$(realpath $1)"
+    make DESTDIR="$dest" install
+    skip=1
+}