misc: Fix build error about missing PAGE_SIZE
misc: Fix build error about missing PAGE_SIZE

This patch fixes the following build error:

  CC libc/misc/internals/__h_errno_location.os
  CC libc/misc/internals/parse_config.os
libc/misc/internals/parse_config.c: In function
'bb_get_chunk_with_continuation':
libc/misc/internals/parse_config.c:77: error: 'PAGE_SIZE' undeclared (first use in this function)
libc/misc/internals/parse_config.c:77: error: (Each undeclared identifier is reported only once
libc/misc/internals/parse_config.c:77: error: for each function it appears in.)
make[2]: *** [libc/misc/internals/parse_config.os] Error 1

Signed-off-by: Abdoulaye Walsimou Gaye <655dd4039015d0b287f10e74a43e299906db51bc@embtoolkit.org>
Signed-off-by: Carmelo Amoroso <532378793705a04edd56deb76ad8c0442834d55d@st.com>

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