Emacs: Better racer-cmd default
Emacs: Better racer-cmd default

Make `racer-cmd` in racer.el default to whatever `racer` is available in
the system PATH.

bluss/racer,racer-rust/racer,rranelli/racer,ifraixedes/racer,phildawes/racer,syohex/racer,MattWis/racer,bluss/racer,drewet/racer,kbknapp/racer,alkama/racer,asantopietro/racer,drewet/racer,ane/racer,kbknapp/racer,ifraixedes/racer,hotpxl/racer,pmarcelll/racer,sthapaun/racer,rranelli/racer,sliz1/racer,jaxx/racer,dleslie/racer,BonsaiDen/racer,sthapaun/racer,ane/racer,syohex/racer,MattWis/racer,birkenfeld/racer,syhkiller/racer,ajroetker/racer,Wilfred/racer,syhkiller/racer,BonsaiDen/racer,asantopietro/racer,ajroetker/racer