libc/regex: fix internal_function declarations
libc/regex: fix internal_function declarations

Build failed with

| In file included from libc/misc/regex/regex.c:59:
| libc/misc/regex/regexec.c:315: error: conflicting types for 're_search_2_stub'
| libc/misc/regex/regexec.c:44: note: previous declaration of 're_search_2_stub' was here
| libc/misc/regex/regexec.c:358: error: conflicting types for 're_search_stub'
| libc/misc/regex/regexec.c:49: note: previous declaration of 're_search_stub' was here
.... etc

Signed-off-by: Roman I Khimov <9c65a1c4e83e5c30b8a170f663f3fbf79112fbfa@altell.ru>
Signed-off-by: Austin Foxley <65462a1d10372f5df6b6641242ca623823c369f3@cetoncorp.com>

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