modified build scripts for different golang versions

util/build.sh

@@ -35,7 +35,13 @@ echo "+------'+------'+------'+------'+------'+------'+------'+------'+------'+-
 echo ""
 echo "You have at least go 1.13.0 installed, so starting to compile Hush lightwalletd for you..."
 cd `pwd`/cmd/server
-go build -o lightwalletd main.go
+# Add diff build flags per golang versions [ Search -mod= here https://go.dev/ref/mod ] 
+if [ $(version $v) -lt $(version "1.16.0") ]; then
+  go build -o lightwalletd main.go
+else
+  go build -mod=mod -o lightwalletd main.go
+fi
+
 # check if compile was success
 if [ $? -ne 0 ]; then
   echo ""

util/build_arm.sh

@@ -35,7 +35,13 @@ echo "+------'+------'+------'+------'+------'+------'+------'+------'+------'+-
 echo ""
 echo "You have at least go 1.13.0 installed, so starting to compile Hush lightwalletd for you..."
 cd `pwd`/cmd/server
-env GOOS=linux GOARCH=arm64 go build -o lightwalletd_aarch64 main.go
+# Add diff build flags per golang versions [ Search -mod= here https://go.dev/ref/mod ] 
+if [ $(version $v) -lt $(version "1.16.0") ]; then
+  env GOOS=linux GOARCH=arm64 go build -o lightwalletd_aarch64 main.go
+else
+  env GOOS=linux GOARCH=arm64 go build -mod=mod -o lightwalletd_aarch64 main.go
+fi
+
 # check if compile was success
 if [ $? -ne 0 ]; then
   echo ""