Build fix: scons doesn't support hyphens in target names.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@20111 0039d316-1c4b-4281-b951-d872f2087c98

sandbox/sandbox.gyp

@@ -10,7 +10,7 @@
     [ 'OS=="linux"', {
       'targets': [
         {
-          'target_name': 'chrome-sandbox',
+          'target_name': 'chrome_sandbox',
           'type': 'executable',
           'sources': [
             'linux/suid/sandbox.cc',