build/pkgs/_prereq/distros/void.txt: Add python3-devel and prereqs

Author: Matthias Köppe

build/pkgs/_prereq/distros/void.txt

@@ -21,3 +21,11 @@ which
 diffutils
 # needed by ppl
 gzip
+# void may need special patches for musl libc support in python3,
+# so require full python 3 and its prereqs
+python3-devel
+bzip2-devel
+xz
+liblzma-devel
+libffi-devel
+zlib-devel