[build] drop -Werror, newer gcc versions emit more warnings, stuff might break on some targets
[build] drop -Werror, newer gcc versions emit more warnings, stuff might break on some targets


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,openwrt/luci,mumuqz/luci,deepak78/new-luci,cshore-firmware/openwrt-luci,thesabbir/luci,aa65535/luci,tobiaswaldvogel/luci,nwf/openwrt-luci,openwrt-es/openwrt-luci,kuoruan/lede-luci,aa65535/luci,cappiewu/luci,ReclaimYourPrivacy/cloak-luci,mumuqz/luci,LazyZhu/openwrt-luci-trunk-mod,chris5560/openwrt-luci,hnyman/luci,lbthomsen/openwrt-luci,joaofvieira/luci,LazyZhu/openwrt-luci-trunk-mod,forward619/luci,jchuang1977/luci-1,zhaoxx063/luci,opentechinstitute/luci,palmettos/test,thesabbir/luci,Sakura-Winkey/LuCI,deepak78/new-luci,LuttyYang/luci,marcel-sch/luci,fkooman/luci,urueedi/luci,mumuqz/luci,florian-shellfire/luci,kuoruan/lede-luci,Hostle/openwrt-luci-multi-user,palmettos/test,dwmw2/luci,joaofvieira/luci,forward619/luci,ReclaimYourPrivacy/cloak-luci,joaofvieira/luci,dismantl/luci-0.12,Hostle/luci,ff94315/luci-1,Hostle/luci,cshore/luci,fkooman/luci,urueedi/luci,Noltari/luci,obsy/luci,bittorf/luci,male-puppies/luci,thess/OpenWrt-luci,opentechinstitute/luci,db260179/openwrt-bpi-r1-luci,male-puppies/luci,Kyklas/luci-proto-hso,openwrt-es/openwrt-luci,Noltari/luci,bittorf/luci,jlopenwrtluci/luci,zhaoxx063/luci,981213/luci-1,mumuqz/luci,oneru/luci,Wedmer/luci,sujeet14108/luci,oneru/luci,db260179/openwrt-bpi-r1-luci,Kyklas/luci-proto-hso,florian-shellfire/luci,david-xiao/luci,taiha/luci,marcel-sch/luci,cappiewu/luci,zhaoxx063/luci,RedSnake64/openwrt-luci-packages,Noltari/luci,nmav/luci,nwf/openwrt-luci,Wedmer/luci,schidler/ionic-luci,shangjiyu/luci-with-extra,jorgifumi/luci,bright-things/ionic-luci,wongsyrone/luci-1,male-puppies/luci,aircross/OpenWrt-Firefly-LuCI,marcel-sch/luci,Kyklas/luci-proto-hso,nwf/openwrt-luci,harveyhu2012/luci,Kyklas/luci-proto-hso,sujeet14108/luci,Hostle/openwrt-luci-multi-user,taiha/luci,deepak78/new-luci,dismantl/luci-0.12,taiha/luci,aircross/OpenWrt-Firefly-LuCI,lcf258/openwrtcn,male-puppies/luci,Hostle/luci,teslamint/luci,tobiaswaldvogel/luci,Noltari/luci,palmettos/cnLuCI,cshore-firmware/openwrt-luci,taiha/luci,Noltari/luci,shangjiyu/luci-with-extra,kuoruan/luci,cshore-firmware/openwrt-luci,981213/luci-1,mumuqz/luci,schidler/ionic-luci,ollie27/openwrt_luci,chris5560/openwrt-luci,zhaoxx063/luci,kuoruan/lede-luci,Wedmer/luci,rogerpueyo/luci,jorgifumi/luci,maxrio/luci981213,Sakura-Winkey/LuCI,cshore/luci,palmettos/cnLuCI,thess/OpenWrt-luci,bittorf/luci,ReclaimYourPrivacy/cloak-luci,Kyklas/luci-proto-hso,schidler/ionic-luci,kuoruan/luci,981213/luci-1,aircross/OpenWrt-Firefly-LuCI,daofeng2015/luci,ollie27/openwrt_luci,bittorf/luci,ollie27/openwrt_luci,ReclaimYourPrivacy/cloak-luci,chris5560/openwrt-luci,artynet/luci,jchuang1977/luci-1,Hostle/luci,jchuang1977/luci-1,dismantl/luci-0.12,teslamint/luci,sujeet14108/luci,shangjiyu/luci-with-extra,lcf258/openwrtcn,opentechinstitute/luci,hnyman/luci,kuoruan/lede-luci,Hostle/openwrt-luci-multi-user,lbthomsen/openwrt-luci,ff94315/luci-1,tobiaswaldvogel/luci,daofeng2015/luci,cshore/luci,NeoRaider/luci,artynet/luci,thess/OpenWrt-luci,harveyhu2012/luci,marcel-sch/luci,jlopenwrtluci/luci,cshore-firmware/openwrt-luci,marcel-sch/luci,NeoRaider/luci,Sakura-Winkey/LuCI,marcel-sch/luci,cappiewu/luci,db260179/openwrt-bpi-r1-luci,aa65535/luci,bright-things/ionic-luci,LuttyYang/luci,bittorf/luci,palmettos/cnLuCI,bittorf/luci,shangjiyu/luci-with-extra,opentechinstitute/luci,jlopenwrtluci/luci,openwrt-es/openwrt-luci,NeoRaider/luci,lcf258/openwrtcn,keyidadi/luci,shangjiyu/luci-with-extra,jlopenwrtluci/luci,obsy/luci,urueedi/luci,Wedmer/luci,dwmw2/luci,Kyklas/luci-proto-hso,sujeet14108/luci,981213/luci-1,MinFu/luci,rogerpueyo/luci,RuiChen1113/luci,RuiChen1113/luci,dismantl/luci-0.12,palmettos/cnLuCI,RedSnake64/openwrt-luci-packages,slayerrensky/luci,Hostle/luci,nmav/luci,jchuang1977/luci-1,palmettos/test,db260179/openwrt-bpi-r1-luci,Hostle/openwrt-luci-multi-user,lbthomsen/openwrt-luci,lcf258/openwrtcn,cappiewu/luci,opentechinstitute/luci,openwrt-es/openwrt-luci,harveyhu2012/luci,bright-things/ionic-luci,urueedi/luci,dismantl/luci-0.12,LuttyYang/luci,tcatm/luci,tobiaswaldvogel/luci,ff94315/luci-1,wongsyrone/luci-1,artynet/luci,LuttyYang/luci,oyido/luci,chris5560/openwrt-luci,cshore-firmware/openwrt-luci,nmav/luci,david-xiao/luci,florian-shellfire/luci,NeoRaider/luci,lcf258/openwrtcn,oyido/luci,ollie27/openwrt_luci,hnyman/luci,tcatm/luci,nmav/luci,keyidadi/luci,keyidadi/luci,lbthomsen/openwrt-luci,rogerpueyo/luci,marcel-sch/luci,nwf/openwrt-luci,remakeelectric/luci,urueedi/luci,RuiChen1113/luci,remakeelectric/luci,forward619/luci,urueedi/luci,teslamint/luci,Sakura-Winkey/LuCI,keyidadi/luci,NeoRaider/luci,oyido/luci,shangjiyu/luci-with-extra,wongsyrone/luci-1,tcatm/luci,harveyhu2012/luci,lcf258/openwrtcn,LazyZhu/openwrt-luci-trunk-mod,florian-shellfire/luci,LazyZhu/openwrt-luci-trunk-mod,RedSnake64/openwrt-luci-packages,fkooman/luci,harveyhu2012/luci,ff94315/luci-1,palmettos/test,ff94315/luci-1,florian-shellfire/luci,chris5560/openwrt-luci,lbthomsen/openwrt-luci,jorgifumi/luci,ollie27/openwrt_luci,maxrio/luci981213,tobiaswaldvogel/luci,sujeet14108/luci,rogerpueyo/luci,aa65535/luci,deepak78/new-luci,dwmw2/luci,bright-things/ionic-luci,bright-things/ionic-luci,ff94315/luci-1,dwmw2/luci,joaofvieira/luci,ff94315/luci-1,nwf/openwrt-luci,bright-things/ionic-luci,hnyman/luci,ReclaimYourPrivacy/cloak-luci,obsy/luci,urueedi/luci,dwmw2/luci,ollie27/openwrt_luci,LazyZhu/openwrt-luci-trunk-mod,thesabbir/luci