autotools: disable static builds on os/2

configure

@@ -26668,7 +26668,8 @@ $as_echo "#define SDL_TIMER_UNIX 1" >>confdefs.h
                 ac_default_prefix=$BUILD_PREFIX
             fi
         fi
-        EXTRA_CFLAGS="$EXTRA_CFLAGS -DOS2EMX_PLAIN_CHAR"
+        enable_static=no # disable static builds
+        EXTRA_CFLAGS="$EXTRA_CFLAGS -DBUILD_SDL -DOS2EMX_PLAIN_CHAR"
         CheckOS2
         CheckDeclarationAfterStatement
         CheckDummyVideo

configure.ac

@@ -4407,7 +4407,8 @@ case "$host" in
                 ac_default_prefix=$BUILD_PREFIX
             fi
         fi
-        EXTRA_CFLAGS="$EXTRA_CFLAGS -DOS2EMX_PLAIN_CHAR"
+        enable_static=no # disable static builds
+        EXTRA_CFLAGS="$EXTRA_CFLAGS -DBUILD_SDL -DOS2EMX_PLAIN_CHAR"
         CheckOS2
         CheckDeclarationAfterStatement
         CheckDummyVideo