[PATCH v3 1/2] scripts: Add "|" operator support to glibcpp's parsing

[Florian Weimer]

* Shahab Vahedi:

> From the tests point of view, this is a necessary step for another
> patch [1] and allows parsing macros such as "#define A | B".  Without
> it, a few tests [2] choke when the other patch [1] is applied:
>
> /src/glibc/scripts/../elf/elf.h:4167: error: uninterpretable macro
> token sequence: ( EF_ARC_MACH_MSK | EF_ARC_OSABI_MSK )
> Traceback (most recent call last):
>     File "/src/glibc/elf/tst-glibcelf.py", line 23, in <module>
>       import glibcelf
>     File "/src/glibc/scripts/glibcelf.py", line 226, in <module>
>       _elf_h = _parse_elf_h()
>                ^^^^^^^^^^^^^^
>     File "/src/glibc/scripts/glibcelf.py", line 223, in _parse_elf_h
>       raise IOError('parse error in elf.h')
>   OSError: parse error in elf.h
>
> [1] ARC: update definitions in elf/elf.h
> https://sourceware.org/pipermail/libc-alpha/2022-November/143503.html
>
> [2]
> tst-glibcelf, tst-relro-ldso, and tst-relro-libc
>
> Signed-off-by: Shahab Vahedi <shahab at synopsys.com>

This okay and can go in separately, thanks.

Reviewed-by: Florian Weimer <fweimer at redhat.com>

Florian