Name unwind info .eh_frame in the Wasmtime's compiled ELF artifact

We were previously using `_wasmtime_eh_frame` but there is no good reason to
add the prefix Wasmtime-specific prefix. Using the standard name allows for
better inspection with standard tools like `dwarfdump`.

crates/cranelift/src/obj.rs

@@ -516,7 +516,7 @@ impl<'a> ObjectBuilder<'a> {
         let segment = self.obj.segment_name(StandardSegment::Data).to_vec();
         let section_id = self.obj.add_section(
             segment,
-            b"_wasmtime_eh_frame".to_vec(),
+            b".eh_frame".to_vec(),
             SectionKind::ReadOnlyData,
         );
         let mut cie = self

crates/jit/src/unwind/systemv.rs

@@ -63,7 +63,7 @@ impl UnwindRegistration {
     }
 
     pub fn section_name() -> &'static str {
-        "_wasmtime_eh_frame"
+        ".eh_frame"
     }
 }