travis: Remove extraneous /tmp/obj dirs

These are no longer used when running containers and tests.

Author: alexcrichton

src/ci/docker/arm-android/Dockerfile

@@ -49,5 +49,3 @@ ENV RUST_CONFIGURE_ARGS \
       --i686-linux-android-ndk=/android/ndk-x86-9 \
       --aarch64-linux-android-ndk=/android/ndk-aarch64
 ENV XPY_CHECK test --target arm-linux-androideabi
-RUN mkdir /tmp/obj
-RUN chmod 777 /tmp/obj

src/ci/docker/cross/Dockerfile

@@ -69,6 +69,3 @@ ENV AR_s390x_unknown_linux_gnu=s390x-linux-gnu-ar \
 
 # FIXME(rust-lang/rust#36150): powerpc unfortunately aborts right now
 ENV NO_LLVM_ASSERTIONS=1
-
-RUN mkdir /tmp/obj
-RUN chmod 777 /tmp/obj

src/ci/docker/i686-gnu-nopt/Dockerfile

@@ -24,5 +24,3 @@ ENTRYPOINT ["/usr/bin/dumb-init", "--"]
 
 ENV RUST_CONFIGURE_ARGS --build=i686-unknown-linux-gnu --disable-optimize-tests
 ENV RUST_CHECK_TARGET check
-RUN mkdir /tmp/obj
-RUN chmod 777 /tmp/obj

src/ci/docker/i686-gnu/Dockerfile

@@ -24,5 +24,3 @@ ENTRYPOINT ["/usr/bin/dumb-init", "--"]
 
 ENV RUST_CONFIGURE_ARGS --build=i686-unknown-linux-gnu
 ENV RUST_CHECK_TARGET check
-RUN mkdir /tmp/obj
-RUN chmod 777 /tmp/obj

src/ci/docker/x86_64-freebsd/Dockerfile

@@ -32,5 +32,3 @@ ENV \
 
 ENV RUST_CONFIGURE_ARGS --target=x86_64-unknown-freebsd
 ENV RUST_CHECK_TARGET ""
-RUN mkdir /tmp/obj
-RUN chmod 777 /tmp/obj

src/ci/docker/x86_64-gnu-cargotest/Dockerfile

@@ -26,5 +26,3 @@ ENTRYPOINT ["/usr/bin/dumb-init", "--"]
 ENV RUST_CONFIGURE_ARGS --build=x86_64-unknown-linux-gnu
 ENV RUST_CHECK_TARGET check-cargotest
 ENV NO_VENDOR 1
-RUN mkdir /tmp/obj
-RUN chmod 777 /tmp/obj

src/ci/docker/x86_64-gnu-debug/Dockerfile

@@ -27,5 +27,3 @@ ENV RUST_CONFIGURE_ARGS \
       --enable-debug \
       --enable-optimize
 ENV RUST_CHECK_TARGET ""
-RUN mkdir /tmp/obj
-RUN chmod 777 /tmp/obj

src/ci/docker/x86_64-gnu-llvm-3.7/Dockerfile

@@ -29,5 +29,3 @@ ENV RUST_CONFIGURE_ARGS \
       --build=x86_64-unknown-linux-gnu \
       --llvm-root=/usr/lib/llvm-3.7
 ENV RUST_CHECK_TARGET check
-RUN mkdir /tmp/obj
-RUN chmod 777 /tmp/obj

src/ci/docker/x86_64-gnu-make/Dockerfile

@@ -24,5 +24,3 @@ ENTRYPOINT ["/usr/bin/dumb-init", "--"]
 
 ENV RUST_CONFIGURE_ARGS --build=x86_64-unknown-linux-gnu --disable-rustbuild
 ENV RUST_CHECK_TARGET check
-RUN mkdir /tmp/obj
-RUN chmod 777 /tmp/obj

src/ci/docker/x86_64-gnu-nopt/Dockerfile

@@ -24,5 +24,3 @@ ENTRYPOINT ["/usr/bin/dumb-init", "--"]
 
 ENV RUST_CONFIGURE_ARGS --build=x86_64-unknown-linux-gnu --disable-optimize-tests
 ENV RUST_CHECK_TARGET check
-RUN mkdir /tmp/obj
-RUN chmod 777 /tmp/obj

src/ci/docker/x86_64-gnu/Dockerfile

@@ -24,5 +24,3 @@ ENTRYPOINT ["/usr/bin/dumb-init", "--"]
 
 ENV RUST_CONFIGURE_ARGS --build=x86_64-unknown-linux-gnu
 ENV RUST_CHECK_TARGET check
-RUN mkdir /tmp/obj
-RUN chmod 777 /tmp/obj

src/ci/docker/x86_64-musl/Dockerfile

@@ -32,6 +32,3 @@ ENV RUST_CONFIGURE_ARGS \
 ENV RUST_CHECK_TARGET check-stage2-T-x86_64-unknown-linux-musl-H-x86_64-unknown-linux-gnu
 ENV PATH=$PATH:/musl-x86_64/bin
 ENV XPY_CHECK test --target x86_64-unknown-linux-musl
-
-RUN mkdir /tmp/obj
-RUN chmod 777 /tmp/obj