[llgo] Fix `debug` to use latest `DIBuilder` bindings
Two recent commits to the LLVM Go bindings caused breaking changes
to llgo:
1. r284707 - Moving the `AlignInBits` field from `DIBasicType` to
`DIAutoVariable`.
2. r284482 - The `AlignInBits` fields going from `uint64` to `uint32`.
This commit updates llgo accordingly.
llvm-svn: 288768
GitOrigin-RevId: 7695d8996f5570b178429b06b48155b35047736c