add gxl bootloader blobs and tools (#1)

* Add gxl blobs
For building mainline u-boot without cloning entire vendor tree.

blx_fix.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+
+#bl2 file size 41K, bl21 file size 3K (file size not equal runtime size)
+#total 44K
+#after encrypt process, bl2 add 4K header, cut off 4K tail
+
+#bl30 limit 41K
+#bl301 limit 12K
+#bl2 limit 41K
+#bl21 limit 3K, but encrypt tool need 48K bl2.bin, so fix to 7168byte.
+
+#$7:name flag
+if [ "$7" = "bl30" ]; then
+	declare blx_bin_limit=40960
+	declare blx01_bin_limit=13312
+elif [ "$7" = "bl2" ]; then
+	declare blx_bin_limit=41984
+	declare blx01_bin_limit=7168
+else
+	echo "blx_fix name flag not supported!"
+	exit 1
+fi
+
+# blx_size: blx.bin size, zero_size: fill with zeros
+declare -i blx_size=`du -b $1 | awk '{print int($1)}'`
+declare -i zero_size=$blx_bin_limit-$blx_size
+dd if=/dev/zero of=$2 bs=1 count=$zero_size
+cat $1 $2 > $3
+rm $2
+
+declare -i blx01_size=`du -b $4 | awk '{print int($1)}'`
+declare -i zero_size_01=$blx01_bin_limit-$blx01_size
+dd if=/dev/zero of=$2 bs=1 count=$zero_size_01
+cat $4 $2 > $5
+
+cat $3 $5 > $6
+
+rm $2
+
+exit 0