Generate an int8 value

Property definitions

nitc $ AbstractCompilerVisitor :: int8_instance
	# Generate an int8 value
	fun int8_instance(value: Int8): RuntimeVariable
	do
		var t = mmodule.int8_type
		var res = new RuntimeVariable("INT8_C({value.to_s})", t, t)
		return res
	end
src/compiler/abstract_compiler.nit:1722,2--1728,4