Add case insensitive argparse choices. (#1431)
Add case insensitive argparse choices. (#1431)

JerryScript-DCO-1.0-Signed-off-by: Robert Sipka rsipka.uszeged@partner.samsung.com
yichoi/jerryscript,glistening/jerryscript,yichoi/jerryscript,martijnthe/jerryscript,grgustaf/jerryscript,jack60504/jerryscript,yichoi/jerryscript,glistening/jerryscript,slaff/jerryscript,loki04/jerryscript,dbatyai/jerryscript,slaff/jerryscript,grgustaf/jerryscript,loki04/jerryscript,gabrielschulhof/jerryscript,LeeHayun/jerryscript,bsdelf/jerryscript,akosthekiss/jerryscript,akosthekiss/jerryscript,slaff/jerryscript,jack60504/jerryscript,robertsipka/jerryscript,bsdelf/jerryscript,bzsolt/jerryscript,jack60504/jerryscript,jerryscript-project/jerryscript,loki04/jerryscript,jack60504/jerryscript,loki04/jerryscript,martijnthe/jerryscript,zherczeg/jerryscript,dbatyai/jerryscript,glistening/jerryscript,LaszloLango/jerryscript,loki04/jerryscript,LeeHayun/jerryscript,grgustaf/jerryscript,jerryscript-project/jerryscript,robertsipka/jerryscript,akosthekiss/jerryscript,LeeHayun/jerryscript,grgustaf/jerryscript,slaff/jerryscript,martijnthe/jerryscript,jack60504/jerryscript,akosthekiss/jerryscript,tilmannOSG/jerryscript,robertsipka/jerryscript,loki04/jerryscript,LeeHayun/jerryscript,slaff/jerryscript,LaszloLango/jerryscript,glistening/jerryscript,robertsipka/jerryscript,martijnthe/jerryscript,LaszloLango/jerryscript,martijnthe/jerryscript,jerryscript-project/jerryscript,tilmannOSG/jerryscript,jerryscript-project/jerryscript,bzsolt/jerryscript,gabrielschulhof/jerryscript,gabrielschulhof/jerryscript,robertsipka/jerryscript,bsdelf/jerryscript,bzsolt/jerryscript,bsdelf/jerryscript,zherczeg/jerryscript,LaszloLango/jerryscript,LaszloLango/jerryscript,tilmannOSG/jerryscript,grgustaf/jerryscript,zherczeg/jerryscript,tilmannOSG/jerryscript,glistening/jerryscript,dbatyai/jerryscript,bsdelf/jerryscript,zherczeg/jerryscript,LeeHayun/jerryscript,robertsipka/jerryscript,bzsolt/jerryscript,glistening/jerryscript,gabrielschulhof/jerryscript,tilmannOSG/jerryscript,yichoi/jerryscript,dbatyai/jerryscript,bzsolt/jerryscript,gabrielschulhof/jerryscript,zherczeg/jerryscript,grgustaf/jerryscript,jack60504/jerryscript,dbatyai/jerryscript,akosthekiss/jerryscript,yichoi/jerryscript,bsdelf/jerryscript,martijnthe/jerryscript,jerryscript-project/jerryscript