Add unifdef host tool to clean target
Add unifdef host tool to clean target

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