fix(npm): support compiling on linux/aarch64 (#16208)

Changes introduced in #13633 have broken the ability to compile for
linux/aarch64 - specifically the use of a `i8` as a char type, which is
an `u8` on linux/aarch64.

This PR:
- Replaces instances of `i8` with the architecture-aware wrapper type
`c_char`
- Skips the use of `--export-dynamic-symbol` on linux-aarch64, because
the target environments often rely on older libc/binutils versions

1 files changed, 0 insertions, 0 deletions

diff --git a/third_party b/third_party
-Subproject 9f314cefb507e3b9de08edc6046353e4012279f
+Subproject 17fd391b8f305d1e74ce7508c824176f09ab63d