Fix printing IR of integer as a pointer with endianness.
Fix printing IR of integer as a pointer with endianness.

When converting an integer value into a pointer and writing out the IR
for it in 'ir_print_exact_value', 'is_type_integer_endian_{little,big}'
did not correct handle being asked about pointer types.

They now reply with whether the endianness of 'uintptr' matches the
endianness being asked about.

gingerBill/Odin,gingerBill/Odin,ThisDrunkDane/Odin,ThisDrunkDane/Odin,gingerBill/Odin,gingerBill/Odin,ThisDrunkDane/Odin