test for nogil functions

tests/run/nogil.pyx

+__doc__ = u"""
+>>> test(5)
+89
+>>> test(11)
+95
+"""
+
+def test(int x):
+    with nogil:
+        f(x)
+        x = g(x)
+    return x
+
+cdef void f(int x) nogil:
+        cdef int y
+        y = x + 42
+        g(y)
+
+cdef int g(int x) nogil:
+        cdef int y
+        y = x + 42
+        return y