Re-disable linux-mips targets

Though not mentioned in the commit message, change
c9643c8 disabled these along with
FreeBSD 14.

Author: asomers

ci/build.sh

@@ -102,12 +102,6 @@ i686-linux-android \
 i686-unknown-freebsd \
 i686-unknown-linux-gnu \
 i686-unknown-linux-musl \
-mips-unknown-linux-gnu \
-mips-unknown-linux-musl \
-mips64-unknown-linux-gnuabi64 \
-mips64el-unknown-linux-gnuabi64 \
-mipsel-unknown-linux-gnu \
-mipsel-unknown-linux-musl \
 powerpc-unknown-linux-gnu \
 powerpc64-unknown-linux-gnu \
 powerpc64le-unknown-linux-gnu \
@@ -118,6 +112,14 @@ x86_64-unknown-linux-musl \
 x86_64-unknown-netbsd \
 "
 
+# FIXME: builds of MIPS targets are currently broken on nightly.
+# mips-unknown-linux-gnu \
+# mips-unknown-linux-musl \
+# mips64-unknown-linux-gnuabi64 \
+# mips64el-unknown-linux-gnuabi64 \
+# mipsel-unknown-linux-gnu \
+# mipsel-unknown-linux-musl \
+
 RUST_GT_1_13_LINUX_TARGETS="\
 arm-unknown-linux-musleabi \
 arm-unknown-linux-musleabihf \

ci/install-rust.sh

@@ -12,6 +12,9 @@ else
   # https://github.com/rust-lang/rust/issues/103673 contains related information.
   case "$TARGET" in
     *android*) toolchain=nightly-2022-10-09;;
+    # FIXME: Unpin once mips' components are available on nightly.
+    # https://rust-lang.github.io/rustup-components-history/mips-unknown-linux-gnu.html
+    *mips*) toolchain=nightly-2023-07-04;;
     *) toolchain=nightly;;
   esac
 fi