Add a test code that imports C structs with array

tests/nimony/sysbasics/ctestarray.h

@@ -0,0 +1,24 @@
+// C header file for testing.
+
+struct CStruct {
+  int field[10];
+};
+
+struct CStruct2 {
+  struct CStruct cs;
+  struct CStruct cs2[2];
+};
+
+void setCStruct(struct CStruct* cs) {
+  cs->field[0] = 567;
+  cs->field[1] = 8910;
+}
+
+void setCStruct2(struct CStruct2* cs2) {
+  cs2->cs.field[0] = 111;
+  cs2->cs.field[1] = 222;
+  cs2->cs2[0].field[0] = 333;
+  cs2->cs2[0].field[1] = 4444;
+  cs2->cs2[1].field[0] = 55555;
+  cs2->cs2[1].field[1] = 666666;
+}

tests/nimony/sysbasics/timportcarray.nim

@@ -0,0 +1,27 @@
+type
+  CInt = int32
+  CStruct {.importc: "struct CStruct", header: "ctestarray.h".} = object
+    field {.importc: "field".}: array[10, CInt]
+  CStruct2 {.importc: "struct CStruct2", header: "ctestarray.h".} = object
+    cs {.importc: "cs".}: CStruct
+    cs2 {.importc: "cs2".}: array[2, CStruct]
+
+proc setCStruct(cs: ptr CStruct) {.importc: "setCStruct", header: "ctestarray.h"}
+proc setCStruct2(cs2: ptr CStruct2) {.importc: "setCStruct2", header: "ctestarray.h"}
+
+block:
+  var cstruct: CStruct
+  setCStruct(addr cstruct)
+  # TODO: Use doAssert when it become available
+  discard cstruct.field[0] == 567
+  discard cstruct.field[1] == 8910
+
+block:
+  var cstruct2: CStruct2
+  setCStruct2(addr cstruct2)
+  discard cstruct2.cs.field[0] == 111
+  discard cstruct2.cs.field[1] == 222
+  discard cstruct2.cs2[0].field[0] == 333
+  discard cstruct2.cs2[0].field[1] == 444
+  discard cstruct2.cs2[1].field[0] == 55555
+  discard cstruct2.cs2[1].field[1] == 666666