Enabling --iree-vm-emit-polyglot-zip by default.
Feels worth the extra ~N KB now that files don't require hacks to
extract. Global debug info stripping flags we add in the future can
disable it; today our modules already have debug info by default.

compiler/src/iree/compiler/Dialect/VM/Target/Bytecode/BytecodeModuleTarget.h

diff --git a/compiler/src/iree/compiler/Dialect/VM/Target/Bytecode/BytecodeModuleTarget.h b/compiler/src/iree/compiler/Dialect/VM/Target/Bytecode/BytecodeModuleTarget.h
index 8ef8a92..8de6760 100644
--- a/compiler/src/iree/compiler/Dialect/VM/Target/Bytecode/BytecodeModuleTarget.h
+++ b/compiler/src/iree/compiler/Dialect/VM/Target/Bytecode/BytecodeModuleTarget.h
@@ -51,8 +51,10 @@
   bool stripDebugOps = false;
 
   // Enables the output .vmfb to be inspected as a ZIP file.
-  // This is only useful for debugging and should be disabled otherwise.
-  bool emitPolyglotZip = false;
+  // This is useful for debugging/diagnosing issues as embedded executables can
+  // be extracted and inspected. It adds several KB to the output files and
+  // should be disabled in release builds.
+  bool emitPolyglotZip = true;
 
   void bindOptions(OptionsBinder &binder);
   using FromFlags = OptionsFromFlags<BytecodeTargetOptions>;

runtime/src/iree/hal/local/executable_library_benchmark.md

diff --git a/runtime/src/iree/hal/local/executable_library_benchmark.md b/runtime/src/iree/hal/local/executable_library_benchmark.md
index ac4bb54..944af5a 100644
--- a/runtime/src/iree/hal/local/executable_library_benchmark.md
+++ b/runtime/src/iree/hal/local/executable_library_benchmark.md
@@ -130,7 +130,7 @@
 2. Extract the executable shared object from the module:
 
 ```
-7z e -aoa -bb0 -y module.vmfb
+unzip module.vmfb
 ```
 
 This (today) results in a single extracted file you pass to the tool: