Robustify setting silent mode
Robustify setting silent mode

Signed-off-by: Bernhard Reutner-Fischer <ce1ac9e9ad16abccd7821f371ad381197b4768ac@gmail.com>

kraj/uclibc-ng,wbx-github/uclibc-ng,waweber/uclibc-clang,m-labs/uclibc-lm32,atgreen/uClibc-moxie,hwoarang/uClibc,hjl-tools/uClibc,foss-for-synopsys-dwc-arc-processors/uClibc,ysat0/uClibc,hwoarang/uClibc,waweber/uclibc-clang,mephi42/uClibc,ysat0/uClibc,OpenInkpot-archive/iplinux-uclibc,foss-xtensa/uClibc,skristiansson/uClibc-or1k,waweber/uclibc-clang,OpenInkpot-archive/iplinux-uclibc,czankel/xtensa-uclibc,ffainelli/uClibc,hjl-tools/uClibc,hjl-tools/uClibc,m-labs/uclibc-lm32,mephi42/uClibc,atgreen/uClibc-moxie,brgl/uclibc-ng,czankel/xtensa-uclibc,ndmsystems/uClibc,groundwater/uClibc,foss-for-synopsys-dwc-arc-processors/uClibc,ffainelli/uClibc,hjl-tools/uClibc,hjl-tools/uClibc,majek/uclibc-vx32,ffainelli/uClibc,groundwater/uClibc,kraj/uclibc-ng,OpenInkpot-archive/iplinux-uclibc,wbx-github/uclibc-ng,groundwater/uClibc,m-labs/uclibc-lm32,mephi42/uClibc,kraj/uclibc-ng,brgl/uclibc-ng,skristiansson/uClibc-or1k,kraj/uClibc,kraj/uClibc,ddcc/klee-uclibc-0.9.33.2,skristiansson/uClibc-or1k,kraj/uClibc,majek/uclibc-vx32,czankel/xtensa-uclibc,ysat0/uClibc,mephi42/uClibc,czankel/xtensa-uclibc,ndmsystems/uClibc,kraj/uclibc-ng,hwoarang/uClibc,ddcc/klee-uclibc-0.9.33.2,hwoarang/uClibc,brgl/uclibc-ng,foss-xtensa/uClibc,majek/uclibc-vx32,ndmsystems/uClibc,foss-xtensa/uClibc,brgl/uclibc-ng,m-labs/uclibc-lm32,wbx-github/uclibc-ng,ysat0/uClibc,ffainelli/uClibc,ndmsystems/uClibc,OpenInkpot-archive/iplinux-uclibc,ffainelli/uClibc,foss-xtensa/uClibc,skristiansson/uClibc-or1k,ddcc/klee-uclibc-0.9.33.2,foss-for-synopsys-dwc-arc-processors/uClibc,majek/uclibc-vx32,waweber/uclibc-clang,groundwater/uClibc,atgreen/uClibc-moxie,ddcc/klee-uclibc-0.9.33.2,foss-for-synopsys-dwc-arc-processors/uClibc,kraj/uClibc,atgreen/uClibc-moxie,groundwater/uClibc,wbx-github/uclibc-ng