Add a snapshot of flutter/engine/src/build to our sdk

build/linux/dump_app_syms.py

Index: build/linux/dump_app_syms.py
diff --git a/build/linux/dump_app_syms.py b/build/linux/dump_app_syms.py
new file mode 100644
index 0000000000000000000000000000000000000000..c18bff77694ae22314a74b2de3f2219b0ccdfee2
--- /dev/null
+++ b/build/linux/dump_app_syms.py
@@ -0,0 +1,29 @@
+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Helper script to run dump_syms on Chrome Linux executables and strip
+# them if needed.
+
+import os
+import subprocess
+import sys
+
+if len(sys.argv) != 5:
+  print "dump_app_syms.py <dump_syms_exe> <strip_binary>"
+  print "                 <binary_with_symbols> <symbols_output>"
+  sys.exit(1)
+
+dumpsyms = sys.argv[1]
+strip_binary = sys.argv[2]
+infile = sys.argv[3]
+outfile = sys.argv[4]
+
+# Dump only when the output file is out-of-date.
+if not os.path.isfile(outfile) or \
+   os.stat(outfile).st_mtime > os.stat(infile).st_mtime:
+  with open(outfile, 'w') as outfileobj:
+    subprocess.check_call([dumpsyms, '-r', infile], stdout=outfileobj)
+
+if strip_binary != '0':
+  subprocess.check_call(['strip', infile])