New review comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/pull/30036#discussion_r609168192

Comment:
```suggestion
_patches="
 Lcommon.h.patch
 Lvalue.h.patch
 Makefile.patch
 clang.patch
 lcalc-1.23_default_parameters_1.patch
 lcalc-1.23_default_parameters_2.patch
 pari-2.7.patch
 pari-mem.patch
 pari_include.patch
 time.h.patch
 using_namespace_std.patch"
```

Nit