aportgen: binutils: Set subpackages="" even in if statements

pmbootstrap aportgen binutils-* attempts to clear the subpackages field in the APKBUILD as specified in

https://gitlab.postmarketos.org/postmarketos/pmbootstrap/-/blob/5c1c126647779efb31469c2d5be472f3a1c4e47e/pmb/aportgen/binutils.py#L22

However, recently an if statement was added upstream where this does not work correctly. To make the build succeed, I've had to remove the if statement manually for now:

https://gitlab.com/postmarketOS/pmaports/-/commit/a28c58a7043638418be522cfc86700e45336335a

Somehow we need to adjust the aportgen code to handle something equivalent to this. One idea might be to remove all occurrences of subpackages="...", even in if statements.