Add polygon and bounding-box.

inputs/asia/philippines/philippines.poly

@@ -0,0 +1,20 @@
+none
+1
+   1.121661E+02   9.000349E+00
+   1.180067E+02   2.153021E+01
+   1.270742E+02   2.152734E+01
+   1.270730E+02   4.829195E+00
+   1.200008E+02   4.749364E+00
+   1.200003E+02   4.382696E+00
+   1.189999E+02   4.442441E+00
+   1.189995E+02   4.700475E+00
+   1.195823E+02   5.266686E+00
+   1.188327E+02   5.999363E+00
+   1.183333E+02   5.999379E+00
+   1.179666E+02   6.282660E+00
+   1.179661E+02   6.866570E+00
+   1.169998E+02   7.666033E+00
+   1.121663E+02   7.666295E+00
+   1.121661E+02   9.000349E+00
+END
+END