Bug 1322784 - Gently fail utime(), to deal with GConf/ORBit. r=gcp

MozReview-Commit-ID: B4LmSGR6OEz

--HG--
extra : rebase_source : 613409994c0ba50c34c57537343484f1dc85b7aa

security/sandbox/linux/SandboxFilter.cpp

@@ -677,6 +677,11 @@ public:
       return If((mode & S_IFMT) == S_IFCHR, Error(EPERM))
         .Else(InvalidSyscall());
     }
+
+      // For ORBit called by GConf (on some systems) to get proxy
+      // settings.  Can remove when bug 1325242 happens in some form.
+    case __NR_utime:
+      return Error(EPERM);
 #endif
 
     case __NR_readlinkat: