unicore32: necessary modifications for other files to support unicore32

Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/default-configs/unicore32-linux-user.mak b/default-configs/unicore32-linux-user.mak
new file mode 100644
index 0000000..6aafd21
--- /dev/null
+++ b/default-configs/unicore32-linux-user.mak
@@ -0,0 +1 @@
+# Default configuration for unicore32-linux-user