Add char types to enum alias link

[christiangnrd]

Feel free to close if I'm incorrect, but I think the "primitive enum values" should be the same in the LinkEnumAlias pass as the ones from cursor.jl?

Clang.jl/src/cursor.jl

Lines 245 to 255 in 572eddf

	if typeKind == CXType_Int ||
	typeKind == CXType_Long ||
	typeKind == CXType_LongLong ||
	typeKind == CXType_Char_S # enum : char
	return clang_getEnumConstantDeclValue(c)
	elseif typeKind == CXType_UInt ||
	typeKind == CXType_ULong ||
	typeKind == CXType_ULongLong ||
	typeKind == CXType_UChar
	return clang_getEnumConstantDeclUnsignedValue(c)
	end

[Gnimuc]

LGTM