disable libutil related prototypes if asked to
disable libutil related prototypes if asked to

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

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