Add -Wl,-Bstatic to "sdl2-config --static-libs" output

sdl2-config.in

@@ -53,7 +53,8 @@ while test $# -gt 0; do
 @ENABLE_SHARED_TRUE@      ;;
 @ENABLE_STATIC_TRUE@@ENABLE_SHARED_TRUE@    --static-libs)
 @ENABLE_STATIC_TRUE@@ENABLE_SHARED_FALSE@    --libs|--static-libs)
-@ENABLE_STATIC_TRUE@      echo -L@libdir@ @SDL_LIBS@ @SDL_STATIC_LIBS@
+@ENABLE_STATIC_TRUE@      sdl_static_libs=$(echo "@SDL_LIBS@ @SDL_STATIC_LIBS@" | sed -E "s#-lSDL2[ $]#-Wl,-Bstatic -lSDL2 -Wl,-Bdynamic #g")
+@ENABLE_STATIC_TRUE@      echo -L@libdir@ $sdl_static_libs
 @ENABLE_STATIC_TRUE@      ;;
     *)
       echo "${usage}" 1>&2