fix: ELF note section parsing alignment and name length comparison

[KoHaRxnP]

Summary

Fixes an issue where Single Executable Application (SEA) tests fail when Node.js is compiled using LLD (zig cc / clang with lld).

Details

1. Dynamic Alignment Calculation: postject_find_resource in deps/postject/postject-api.h previously hardcoded note section padding to 4 bytes (roundup(..., 4)). On 64-bit ELF binaries produced by LLD, notes use 8-byte alignment (phdr->p_align), which led to offset misalignment and segment errors. This PR updates the logic to dynamically calculate padding using phdr->p_align.
2. Corrected Name Comparison Length: Replaced sizeof(name) in strncmp (which evaluated to pointer size) with name_len (strlen(name) / n_namesz check).