Format python files.

I used yapf to apply to Google style but I had to install with pip and
invoke the library as a script so not suitable for integration yet.

Change-Id: I8c3d9c334bf1766f0fff7217270c148a3d1d7662
diff --git a/build/image/extract_offsets.py b/build/image/extract_offsets.py
index 23e711a..c52d01b 100644
--- a/build/image/extract_offsets.py
+++ b/build/image/extract_offsets.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-
 """Extract embedded offsets from an object file.
 
 We let the compiler calculate the offsets it is going to use and have those
@@ -12,35 +11,35 @@
 import subprocess
 import sys
 
+
 def Main():
-  parser = argparse.ArgumentParser()
-  parser.add_argument("--tool_prefix", required=True)
-  parser.add_argument("--input", required=True)
-  parser.add_argument("--output", required=True)
-  args = parser.parse_args()
-  raw = subprocess.check_output([
-      "{}objdump".format(args.tool_prefix),
-      "--disassemble-all",
-      "--section",
-      ".rodata",
-      args.input])
-  lines = raw.split('\n')
-  with open(args.output, 'w') as header:
-    header.write('#pragma once\n\n')
-    for n in range(len(lines)):
-      # Find a defined offset
-      match = re.match('.+DEFINE_OFFSET__([^>]+)', lines[n])
-      if not match:
-        continue
-      name = match.group(1)
-      # The next line tells the offset
-      if "..." in lines[n + 1]:
-        offset = 0
-      else:
-        offset = re.match('.+\.[\S]+\s+(.+)$', lines[n + 1]).group(1)
-      # Write the offset to the header
-      header.write("#define {} {}\n".format(name, offset))
-  return 0
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--tool_prefix", required=True)
+    parser.add_argument("--input", required=True)
+    parser.add_argument("--output", required=True)
+    args = parser.parse_args()
+    raw = subprocess.check_output([
+        "{}objdump".format(args.tool_prefix), "--disassemble-all", "--section",
+        ".rodata", args.input
+    ])
+    lines = raw.split('\n')
+    with open(args.output, 'w') as header:
+        header.write('#pragma once\n\n')
+        for n in range(len(lines)):
+            # Find a defined offset
+            match = re.match('.+DEFINE_OFFSET__([^>]+)', lines[n])
+            if not match:
+                continue
+            name = match.group(1)
+            # The next line tells the offset
+            if "..." in lines[n + 1]:
+                offset = 0
+            else:
+                offset = re.match('.+\.[\S]+\s+(.+)$', lines[n + 1]).group(1)
+            # Write the offset to the header
+            header.write("#define {} {}\n".format(name, offset))
+    return 0
+
 
 if __name__ == "__main__":
-  sys.exit(Main())
+    sys.exit(Main())