PNaCl: Build a PPAPI shims library for all architectures

ppapi/native_client/src/untrusted/pnacl_irt_shim/shim_ppapi.c

Index: ppapi/native_client/src/untrusted/pnacl_irt_shim/shim_ppapi.c
diff --git a/ppapi/native_client/src/untrusted/pnacl_irt_shim/shim_ppapi.c b/ppapi/native_client/src/untrusted/pnacl_irt_shim/shim_ppapi.c
index dd39f656c6b79dce7dbee2c1ed93c3ab7eb4092e..3a7825c446b91b8975233f9ed14a32a988fd0c12 100644
--- a/ppapi/native_client/src/untrusted/pnacl_irt_shim/shim_ppapi.c
+++ b/ppapi/native_client/src/untrusted/pnacl_irt_shim/shim_ppapi.c
@@ -12,6 +12,9 @@
 #include "native_client/src/untrusted/irt/irt_ppapi.h"
 #include "ppapi/generators/pnacl_shim.h"
 
+/* The PNaCl PPAPI shims are only needed on x86-64. */
+#if defined(__x86_64__)
+
 TYPE_nacl_irt_query __pnacl_real_irt_interface;
 
 /*
@@ -100,3 +103,5 @@ size_t __pnacl_irt_interface_wrapper(const char *interface_ident,
   }
   return 0;
 }
+
+#endif