Handle 0...MACRO foreach range normalization in included files

PR #3816 adds a fix for cases like 0...MAXI, where Clang lexes the whole sequence as one preprocessing-number token and therefore does not expand MAXI as a macro. The current implementation only applies this fix to the main input file.

A pattern such as:
```ispc
foreach (i = 0...MAXI) {
}
```
is normalized correctly when it appears in the main source file, but the same pattern fail when it appears in an included file

Test: https://github.com/ispc/ispc/blob/bcd89e210c59eae96fa615694146af789eb90032/tests/lit-tests/3809-include-limitation.ispc