Blackfin: add L2_SRAM flag for alloc func
Blackfin: add L2_SRAM flag for alloc func

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