configure: Use tput instead of hardcoded color constants
configure: Use tput instead of hardcoded color constants

fxfactorial/merlin,neojski/merlin,ocaml/merlin,fxfactorial/merlin,chambart/merlin,neojski/merlin,dra27/merlin,chambart/merlin,dra27/merlin,haselwarter/merlin,dra27/merlin,ocaml/merlin,ocaml/merlin,fxfactorial/merlin,the-lambda-church/merlin,chriskonstad/merlin,ocaml/merlin,chambart/merlin,neojski/merlin,the-lambda-church/merlin,rgrinberg/merlin,rgrinberg/merlin,dra27/merlin,rgrinberg/merlin,neojski/merlin,haselwarter/merlin,haselwarter/merlin,chambart/merlin,fxfactorial/merlin,the-lambda-church/merlin,rgrinberg/merlin,chriskonstad/merlin,haselwarter/merlin