In the CHERI and Arm Morello targets we support a compilation mode that
has multiple pointer sizes (32/64-bit integers as well as capabilities that are
twice that size). In order to support this in the debugger we emit
DW_AT_byte_size for pointer and reference types if their size is different
from the target's pointer size for the alloca address space.
This patch found the pointer size mismatch that I fixed in D99410.