New build script, to make MinGW builds that can run on older processors that lack SSE2, SSE, and MMX

build-mingw-lowend

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+# prefer to compile against our own copy of SDL 1.x
+echo Compiling our internal SDL 1.x
+(cd vs2015/sdl && ./build-dosbox.sh) || exit 1
+
+# now compile ourself
+echo Compiling DOSBox-X
+chmod +x configure
+# FIXME: I would like MinGW builds to enable the debugger, eventually
+./configure --enable-core-inline --disable-mt32 --prefix=/usr || exit 1
+make -j3 || exit 1
+