Add sdl2-symvers.patch

OBS-URL: https://build.opensuse.org/package/show/games/SDL2?expand=0&rev=71

SDL2.spec

@@ -1,7 +1,7 @@
 #
 # spec file for package SDL2
 #
-# Copyright (c) 2017 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2018 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -30,6 +30,7 @@ Source:         http://libsdl.org/release/%name-%version.tar.gz
 Source2:        http://libsdl.org/release/%name-%version.tar.gz.sig
 Source3:        %name.keyring
 Source4:        baselibs.conf
+Patch1:         sdl2-symvers.patch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildRequires:  cmake
 BuildRequires:  dos2unix
@@ -103,6 +104,7 @@ library.
 
 %prep
 %setup -q
+%patch -P 1 -p1
 dos2unix WhatsNew.txt
 dos2unix TODO.txt
 dos2unix BUGS.txt