READMEs updates

Author: ilg-ul

README-RELEASE.md

@@ -120,14 +120,16 @@ Before the real build, run a test build on the development machine (`wksi`)
 or the production machines (`xbbma`, `xbbmi`):
 
 ```sh
-sudo rm -rf ~/Work/qemu-riscv-*-*
+rm -rf ~/Work/qemu-riscv-*-*
 
 caffeinate bash ${HOME}/Work/qemu-riscv-xpack.git/scripts/helper/build.sh --develop --macos
 ```
 
 Similarly on the Intel Linux (`xbbli`):
 
 ```sh
+sudo rm -rf ~/Work/qemu-riscv-*-*
+
 bash ${HOME}/Work/qemu-riscv-xpack.git/scripts/helper/build.sh --develop --linux64
 
 bash ${HOME}/Work/qemu-riscv-xpack.git/scripts/helper/build.sh --develop --win64