Use mimalloc when targeting musl

Also removes the armv7 linux build.
If you were using this, let me know!

Updates all dependencies

src/main.rs

@@ -13,6 +13,12 @@ pub mod cmd;
 pub mod obj;
 pub mod util;
 
+// musl's allocator is very slow, so use mimalloc when targeting musl.
+// Otherwise, use the system allocator to avoid extra code size.
+#[cfg(target_env = "musl")]
+#[global_allocator]
+static ALLOC: mimalloc::MiMalloc = mimalloc::MiMalloc;
+
 #[derive(Debug, Eq, PartialEq, Copy, Clone)]
 enum LogLevel {
     Error,

src/util/diff.rs

@@ -291,6 +291,7 @@ fn to_objdiff_symbol(
     if symbol.flags.is_hidden() {
         flags.0 |= objdiff_core::obj::ObjSymbolFlags::Hidden;
     }
+    let bytes = section.and_then(|s| s.symbol_data(symbol).ok()).map_or(vec![], |d| d.to_vec());
     objdiff_core::obj::ObjSymbol {
         name: symbol.name.clone(),
         demangled_name: symbol.demangled_name.clone(),
@@ -302,6 +303,7 @@ fn to_objdiff_symbol(
         addend,
         virtual_address: None,
         original_index: None,
+        bytes,
     }
 }