libc-symbols: add attribute_protected
libc-symbols: add attribute_protected

Definition to use protected visibility.

Signed-off-by: Timo Teras <266f729f1f620250264df63d5dfd302c2a88080e@iki.fi>
Signed-off-by: Austin Foxley <65462a1d10372f5df6b6641242ca623823c369f3@cetoncorp.com>

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