New upstream version 2018.6

rust/vendor/libc/ci/docker/x86_64-unknown-freebsd/Dockerfile

@@ -0,0 +1,13 @@
+FROM wezm/port-prebuilt-freebsd11@sha256:43553e2265ec702ec72a63a765df333f50b1858b896e69385749e96d8624e9b0
+
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+  qemu genext2fs xz-utils
+RUN apt-get install -y curl ca-certificates gcc
+
+ENTRYPOINT ["sh"]
+
+ENV PATH=$PATH:/rust/bin \
+    QEMU=2018-03-15/FreeBSD-11.1-RELEASE-amd64.qcow2.xz \
+    CAN_CROSS=1 \
+    CARGO_TARGET_X86_64_UNKNOWN_FREEBSD_LINKER=x86_64-unknown-freebsd11-gcc