Add test for emstrip (#16952)

2nd part of the fix for #16884

Author: dschuff

tests/common.py

@@ -79,6 +79,7 @@
 EMBUILDER = shared.bat_suffix(path_from_root('embuilder'))
 EMMAKE = shared.bat_suffix(path_from_root('emmake'))
 WASM_DIS = Path(building.get_binaryen_bin(), 'wasm-dis')
+LLVM_OBJDUMP = os.path.expanduser(shared.build_llvm_tool_path(shared.exe_suffix('llvm-objdump')))
 
 
 def delete_contents(pathname):

tests/test_other.py

@@ -48,6 +48,7 @@
 emconfig = shared.bat_suffix(path_from_root('em-config'))
 emsize = shared.bat_suffix(path_from_root('emsize'))
 emprofile = shared.bat_suffix(path_from_root('emprofile'))
+emstrip = shared.bat_suffix(path_from_root('emstrip'))
 emsymbolizer = shared.bat_suffix(path_from_root('emsymbolizer'))
 wasm_opt = Path(building.get_binaryen_bin(), 'wasm-opt')
 
@@ -609,6 +610,14 @@ def test_emsize(self):
       output = self.run_process(cmd, stdout=PIPE).stdout
       self.assertContained(expected, output)
 
+  def test_emstrip(self):
+    self.run_process([EMCC, test_file('hello_world.c'), '-g', '-o', 'hello.js'])
+    output = self.run_process([common.LLVM_OBJDUMP, '-h', 'hello.wasm'], stdout=PIPE).stdout
+    self.assertContained('.debug_info', output)
+    self.run_process([emstrip, 'hello.wasm'])
+    output = self.run_process([common.LLVM_OBJDUMP, '-h', 'hello.wasm'], stdout=PIPE).stdout
+    self.assertNotContained('.debug_info', output)
+
   @is_slow_test
   @parameterized({
     # ('directory to the test', 'output filename', ['extra args to pass to