Remove the now obsolete "headers" target.  Fix call to get-needed-libgcc-objects.sh to we define NM and AR properly.
Remove the now obsolete "headers" target.  Fix call to get-needed-libgcc-objects.sh
to we define NM and AR properly.

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