Build only the appropriate x86 arches for nacl (chrome side).

ppapi/native_client/native_client.gyp

Index: ppapi/native_client/native_client.gyp
diff --git a/ppapi/native_client/native_client.gyp b/ppapi/native_client/native_client.gyp
index 977af5469eb9995a70505d51650bba7abd78937e..91f081be6393959fb5881b9009311b6b9ceefe70 100644
--- a/ppapi/native_client/native_client.gyp
+++ b/ppapi/native_client/native_client.gyp
@@ -45,6 +45,10 @@
                     'src/shared/ppapi_proxy/ppruntime.h',
                   ],
                 },
+              ],
+            }],
+            ['target_arch=="ia32"', {
+              'copies': [
                 # Here we copy linker scripts out of the Native Client repo..
                 # These are source, not build artifacts.
                 {
@@ -54,16 +58,20 @@
                   ],
                 },
                 {
-                  'destination': '>(tc_lib_dir_newlib64)',
+                  'destination': '>(tc_lib_dir_glibc32)',
                   'files': [
                     'src/untrusted/irt_stub/libppapi.a',
+                    'src/untrusted/irt_stub/libppapi.so',
                   ],
                 },
+              ],
+            }],
+            ['target_arch=="x64" or (target_arch=="ia32" and OS=="win")', {
+              'copies': [
                 {
-                  'destination': '>(tc_lib_dir_glibc32)',
+                  'destination': '>(tc_lib_dir_newlib64)',
                   'files': [
                     'src/untrusted/irt_stub/libppapi.a',
-                    'src/untrusted/irt_stub/libppapi.so',
                   ],
                 },
                 {