config_parser: hide symbols
config_parser: hide symbols

Our impl has diverged from busybox' so make sure nobody else uses it.

Signed-off-by: Bernhard Reutner-Fischer <ce1ac9e9ad16abccd7821f371ad381197b4768ac@gmail.com>

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