Set CGO_ENABLED=1 on riscv64

CGO works fine on riscv64 thus should be enabled.
Avoid build error golang/go#64875

Signed-off-by: Zhuo Zhi <[email protected]>

Author: Xeonacid

scripts/build/.variables

@@ -48,7 +48,7 @@ if [ -z "$CGO_ENABLED" ]; then
     case "$(go env GOOS)" in
         linux)
             case "$(go env GOARCH)" in
-                amd64|arm64|arm|s390x)
+                amd64|arm64|arm|s390x|riscv64)
                     CGO_ENABLED=1
                 ;;
                 *)