fix issue with comparing large digest values

posix ( ) dosent support this long values

Author: SaicharanKandukuri

udroid/src/udroid.sh

@@ -114,7 +114,7 @@ verify_integrity() {
     LOG "filesum=$filesha"
     LOG "shasum=$shasum"
 
-    if ((filesha != shasum)); then
+    if [ $filesha -eq $shasum ]; then
         LOG "file integrity check failed"
         GWARN "file integrity check failed"
         return 1