testsuite: use KERNEL_HEADERS
testsuite: use KERNEL_HEADERS

Signed-off-by: Denys Vlasenko <42afb3a19136e88700e8b77002ea6a5a94c16782@googlemail.com>

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