openssl: fix powerpc-linux build (#442745)

Changed files
+1
pkgs
development
libraries
openssl
+1
pkgs/development/libraries/openssl/default.nix
···
aarch64-darwin = "./Configure darwin64-arm64-cc";
x86_64-linux = "./Configure linux-x86_64";
x86_64-solaris = "./Configure solaris64-x86_64-gcc";
+
powerpc-linux = "./Configure linux-ppc";
powerpc64-linux = "./Configure linux-ppc64";
riscv32-linux = "./Configure ${
if lib.versionAtLeast version "3.2" then "linux32-riscv32" else "linux-latomic"