Rename "Stackmap" to "StackMap"

And "stackmap" to "stack_map".

This commit is purely mechanical.

cranelift/src/bugpoint.rs

@@ -1,6 +1,6 @@
 //! CLI tool to reduce Cranelift IR files crashing during compilation.
 
-use crate::disasm::{PrintRelocs, PrintStackmaps, PrintTraps};
+use crate::disasm::{PrintRelocs, PrintStackMaps, PrintTraps};
 use crate::utils::{parse_sets_and_triple, read_to_string};
 use cranelift_codegen::cursor::{Cursor, FuncCursor};
 use cranelift_codegen::flowgraph::ControlFlowGraph;
@@ -1045,14 +1045,14 @@ impl<'a> CrashCheckContext<'a> {
         let res = match std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {
             let mut relocs = PrintRelocs::new(false);
             let mut traps = PrintTraps::new(false);
-            let mut stackmaps = PrintStackmaps::new(false);
+            let mut stack_maps = PrintStackMaps::new(false);
 
             let _ = self.context.compile_and_emit(
                 self.isa,
                 &mut self.code_memory,
                 &mut relocs,
                 &mut traps,
-                &mut stackmaps,
+                &mut stack_maps,
             );
         })) {
             Ok(()) => CheckResult::Succeed,