Don't build NaCl's syscall handler into a shared library

Fixes shared library Chromium build on x86-64 on Linux.

BUG=35829
TEST=build

Review URL: http://codereview.chromium.org/652109
Patch from mseaborn@.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@39729 0039d316-1c4b-4281-b951-d872f2087c98

chrome/nacl.gypi

@@ -47,7 +47,10 @@
   'targets': [
     {
       'target_name': 'nacl',
-      'type': '<(library)',
+      # The TLS (Thread Local Storage) access used by NaCl on x86-64
+      # on Linux/ELF can't be linked into a shared library, so we
+      # can't use '<(library)' here.  See http://crbug.com/35829.
+      'type': 'static_library',
       'msvs_guid': '83E86DAF-5763-4711-AD34-5FDAE395560C',
       'variables': {
         'nacl_target': 1,