locale: gen_wc8bit: try to find UTF8 locale automatically
locale: gen_wc8bit: try to find UTF8 locale automatically

Rather than require everyone to have en_US.UTF-8 when we really need any
UTF8 locale, do a scan for possible UTF8 locales if the default en_US does
not exist.  Hopefully this should make the utility "just work" for most
people.

Reported-by: Daniel Cordero <f890ca78d7f96d2a30d708bbd6a7d2357ca6c0a6@gmail.com>
Signed-off-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@gentoo.org>

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