use string evaluation instead

using -eq or -ge make bash to perfrom integer evaluation

Author: SaicharanKandukuri

udroid/src/udroid.sh

@@ -114,9 +114,8 @@ verify_integrity() {
     LOG "filesum=$filesha"
     LOG "shasum=$shasum"
 
-    if [[ $filesha -eq $shasum ]]; then
+    if [[ "$filesha" == "$shasum" ]]; then
         LOG "file integrity check failed"
-        GWARN "file integrity check failed"
         return 1
     else
         LOG "file integrity check passed"