some (all?) archs don't define asm, so use builtin __asm__
some (all?) archs don't define asm, so use builtin __asm__

Signed-off-by: Austin Foxley <65462a1d10372f5df6b6641242ca623823c369f3@cetoncorp.com>

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