Support internal properties in GC mark. (#1646)
Support internal properties in GC mark. (#1646)

Some internal properties are incorrectly handled as objects and
marked as visited. This memory overwrite caused random crashes
in IoT.js.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
gabrielschulhof/jerryscript,martijnthe/jerryscript,yichoi/jerryscript,glistening/jerryscript,robertsipka/jerryscript,zherczeg/jerryscript,jerryscript-project/jerryscript,martijnthe/jerryscript,zherczeg/jerryscript,robertsipka/jerryscript,jack60504/jerryscript,glistening/jerryscript,jerryscript-project/jerryscript,bsdelf/jerryscript,bsdelf/jerryscript,jerryscript-project/jerryscript,bzsolt/jerryscript,jerryscript-project/jerryscript,zherczeg/jerryscript,bzsolt/jerryscript,akosthekiss/jerryscript,LaszloLango/jerryscript,LaszloLango/jerryscript,gabrielschulhof/jerryscript,gabrielschulhof/jerryscript,jack60504/jerryscript,LaszloLango/jerryscript,dbatyai/jerryscript,zherczeg/jerryscript,martijnthe/jerryscript,bzsolt/jerryscript,bsdelf/jerryscript,zherczeg/jerryscript,glistening/jerryscript,grgustaf/jerryscript,robertsipka/jerryscript,gabrielschulhof/jerryscript,grgustaf/jerryscript,glistening/jerryscript,martijnthe/jerryscript,gabrielschulhof/jerryscript,bsdelf/jerryscript,dbatyai/jerryscript,akosthekiss/jerryscript,jack60504/jerryscript,yichoi/jerryscript,LaszloLango/jerryscript,bsdelf/jerryscript,martijnthe/jerryscript,yichoi/jerryscript,jack60504/jerryscript,bsdelf/jerryscript,yichoi/jerryscript,grgustaf/jerryscript,dbatyai/jerryscript,jack60504/jerryscript,dbatyai/jerryscript,glistening/jerryscript,dbatyai/jerryscript,bzsolt/jerryscript,martijnthe/jerryscript,grgustaf/jerryscript,bzsolt/jerryscript,yichoi/jerryscript,grgustaf/jerryscript,glistening/jerryscript,jerryscript-project/jerryscript,akosthekiss/jerryscript,robertsipka/jerryscript,robertsipka/jerryscript,akosthekiss/jerryscript,grgustaf/jerryscript,jack60504/jerryscript,robertsipka/jerryscript,akosthekiss/jerryscript,LaszloLango/jerryscript