[lldb/Test] Skip TestExpressionInSyscall with reproducers

Skip this test because it relies on a timeout.

lldb/test/API/commands/expression/expr-in-syscall/TestExpressionInSyscall.py

@@ -14,6 +14,7 @@ class ExprSyscallTestCase(TestBase):
         oslist=["windows"],
         bugnumber="llvm.org/pr21765, getpid() does not exist on Windows")
     @expectedFailureNetBSD
+    @skipIfReproducer
     def test_setpgid(self):
         self.build()
         self.expr_syscall()