Add misser lexer entry for nesC to languages.yml
Add misser lexer entry for nesC to languages.yml

The nesC entry in the languages.yml file was missing a lexer entry
and thus wasn't getting picked up. This adds the required lexer line.

hcutler/linguist,steventhanna/linguist,thejameskyle/linguist,JJ/linguist,meunierfrederic/octocatlinguist,yyx990803/linguist,blakeembrey/linguist,phpsgi/linguist,osorgin/linguist,alitalia/linguist,manveru/linguist,douglas-larocca/linguist,JJ/linguist,CoderXpert/linguist,stanhu/linguist,steventhanna/linguist,alitalia/linguist,mcandre/linguist,MahmoudFayed/linguist,JJ/linguist,ppaulweber/github-linguist,nburkley/linguist,Mx7f/linguist,BerkeleyTrue/linguist,anhongyue/test222,c-lipka/linguist,FStarLang/linguist,a0viedo/linguist,douglas-larocca/linguist,cokeboL/linguist,adamkaplan/linguist,sagar290/linguist,marcojonker/test,FStarLang/linguist,pchaigno/linguist,github/linguist,cybernet14/linguist,MostAwesomeDude/linguist,mattn/linguist,mwpastore/linguist,bluebear94/linguist,scttnlsn/linguist,yyx990803/linguist,sideci-sample/sideci-sample-linguist,iblech/linguist,georgesuperman/linguist,tschf/linguist,0a-/linguist,ppaulweber/github-linguist,pchaigno/linguist,jtbandes/linguist,cybernet14/linguist,georgesuperman/linguist,a0viedo/linguist,MadcapJake/linguist,sebgod/linguist,jjatria/linguist,SRI-CSL/linguist,sideci-sample/sideci-sample-linguist,CoderXpert/linguist,bluebear94/linguist,chiranjeevjain/linguist,christop/linguist,seanders/linguist,erkyrath/linguist,c-lipka/linguist,Rockyspade/linguist,thejameskyle/linguist,matt40k/linguist,erkyrath/linguist,jjatria/linguist,pchaigno/linguist,pcantrell/linguist,christop/linguist,stanhu/linguist,mwpastore/linguist,matt40k/linguist,ilyes14/linguist,adamkaplan/linguist,iblech/linguist,MostAwesomeDude/linguist,mattn/linguist,yscho/linguist,pcantrell/linguist,kyoungrok0517/linguist,JJ/linguist,ya7lelkom/linguist,MahmoudFayed/linguist,Rockyspade/linguist,martynbm/linguist,Mx7f/linguist,seanders/linguist,ilyes14/linguist,github/linguist,phpsgi/linguist,anhongyue/test222,martynbm/linguist,sebgod/linguist,erkyrath/linguist,erkyrath/linguist,CegepVictoriaville/linguist,meunierfrederic/octocatlinguist,kr/linguist,osorgin/linguist,pchaigno/linguist,alvarotrigo/linguist,yscho/linguist,hcutler/linguist,SRI-CSL/linguist,scttnlsn/linguist,R4PaSs/linguist,wcandillon/linguist,tschf/linguist,wcandillon/linguist,ammaraskar/linguist,yyx990803/linguist,meunierfrederic/octocatlinguist,hcatlin/linguist,jrnold/linguist,PsichiX/linguist,jrnold/linguist,mcandre/linguist,nburkley/linguist,marcojonker/test,kyoungrok0517/linguist,sagar290/linguist,assimovt/ling-ist,blakeembrey/linguist,cokeboL/linguist,davidzchen/linguist,PsichiX/linguist,CegepVictoriaville/linguist,BerkeleyTrue/linguist,stanhu/linguist,ChaiScript/linguist,ya7lelkom/linguist,manveru/linguist,ammaraskar/linguist,davidzchen/linguist,assimovt/ling-ist,github/linguist,sebgod/linguist,chiranjeevjain/linguist,0a-/linguist,sebgod/linguist,kr/linguist,alvarotrigo/linguist,MadcapJake/linguist,R4PaSs/linguist,whitj00/linguist,yyx990803/linguist,whitj00/linguist,github/linguist,stanhu/linguist,hcatlin/linguist,jtbandes/linguist