Fix Go 1.26 build compatibility: remove bin stubs before go build

Go 1.26 refuses to overwrite non-object files with 'go build -o'.
Add 'rm -f "${output}"' before each go build invocation so the
shell script stubs in bin/ are removed first.

Author: ramonskie

scripts/build.sh

@@ -27,6 +27,7 @@ function main() {
         output="${output}.exe"
       fi
 
+      rm -f "${output}"
       CGO_ENABLED=0 \
       GOOS="${os}" \
       GOARCH=amd64 \