Rollup merge of rust-lang#44199 - jakllsch:jakllsch-abcc6c4a-0caf-4d30-b336-39629c73d3f5, r=sfackler

bootstrap: add openssl configuration mapping for i686-unknown-netbsd

Author: GuillaumeGomez

src/bootstrap/native.rs

@@ -407,6 +407,7 @@ impl Step for Openssl {
             "i686-unknown-freebsd" => "BSD-x86-elf",
             "i686-unknown-linux-gnu" => "linux-elf",
             "i686-unknown-linux-musl" => "linux-elf",
+            "i686-unknown-netbsd" => "BSD-x86-elf",
             "mips-unknown-linux-gnu" => "linux-mips32",
             "mips64-unknown-linux-gnuabi64" => "linux64-mips64",
             "mips64el-unknown-linux-gnuabi64" => "linux64-mips64",