message: Change tests_errors/soa-11.ispc to match new format of error message
diff: -// Type conversion from "const uniform int[0-9]*" to "soa<4> struct Foo" for assignment operator is not possible
  +// Type conversion from "const uniform int[0-9]*" to "soa<4> struct Foo" for = is not possible
  struct Pt { float x, y, z; };
  