!84 支持qemu with gdb调试

Merge pull request !84 from wzc0066/wzc

bsp/qemu-vexpress-a9/gdb.init

@@ -0,0 +1,3 @@
+target remote localhost:1234
+b *0x100010
+add-symbol-file ../../../userapps/gnu-apps/wget/wget-1.20/src/wget 0x100000

bsp/qemu-vexpress-a9/qemu-dbg.sh

@@ -2,5 +2,6 @@ if [ ! -f "sd.bin" ]; then
 dd if=/dev/zero of=sd.bin bs=1024 count=65536
 fi
 
+#qemu-system-arm -M vexpress-a9 -kernel rtthread.elf -serial vc -serial vc -sd sd.bin -S -s
+qemu-system-arm -M vexpress-a9 -kernel rtthread.bin -nographic -sd sd.bin -S -s
 
-qemu-system-arm -M vexpress-a9 -kernel rtthread.elf -serial vc -serial vc -sd sd.bin -S -s