run-make tests fail when configured for multiple targets

[brson]

Something about the use of % seems to make these rules not expand correctly, resulting in

cfg: build triple x86_64-unknown-linux-gnu
cfg: host triples x86_64-unknown-linux-gnu
cfg: target triples x86_64-unknown-linux-gnu i686-unknown-linux-gnu
cfg: non-build target triples i686-unknown-linux-gnu
cfg: enabling more debugging (CFG_ENABLE_DEBUG)
cfg: host for x86_64-unknown-linux-gnu is x86_64
cfg: host for i686-unknown-linux-gnu is i386
cfg: os for x86_64-unknown-linux-gnu is unknown-linux-gnu
cfg: os for i686-unknown-linux-gnu is unknown-linux-gnu
cfg: using gcc
cfg: no llnextgen found, omitting grammar-verification
cfg: including dist rules
cfg: including test rules
make -C x86_64-unknown-linux-gnu/rt/libuv CFLAGS="-Wall  -g -fPIC -m64 " LDFLAGS="-shared -fPIC -ldl -pthread  -lrt -g -m64" CC="gcc" CXX="g++" AR="ar"  builddir="." BUILDTYPE=Release NO_LOAD="run-benchmarks.target.mk run-tests.target.mk uv_dtrace_header.target.mk uv_dtrace_provider.target.mk" V=1
make[1]: Entering directory `/opt/dev/rust3/build/x86_64-unknown-linux-gnu/rt/libuv'
make[1]: Circular libuv.a <- libuv.a dependency dropped.
  ln -f "obj.target/libuv.a" "libuv.a" 2>/dev/null || (rm -rf "libuv.a" && cp -af "obj.target/libuv.a" "libuv.a")
make[1]: Leaving directory `/opt/dev/rust3/build/x86_64-unknown-linux-gnu/rt/libuv'
make: *** No rule to make target `x86_64-unknown-linux-gnu/test/run-make/bootstrap-from-c-with-uvio-1-T-i686-unknown-linux-gnu-H-x86_64-unknown-linux-gnu.ok', needed by `tmp/check-stage1-T-i686-unknown-linux-gnu-H-x86_64-unknown-linux-gnu-rmake.ok'.  Stop.

[huonw]

part of #8058

[frewsxcv]

visiting for triage

The FIXME for this issue still exists in the mk/test.mk file, so I assume this is still a valid issue. I'm not well-versed enough in the Make process to know for sure though

[steveklabnik]

Triage: echoing what @frewsxcv says, but also noting that rustbuild will eventually obviate this.

[alexcrichton]

Make's now gone, so closing.

(rustbuild handles this I believe)

[Eh2406]

There is a FIXME related to this issue,
https://github.com/rust-lang/rust/blob/master/src/tools/compiletest/src/runtest.rs#L2070
Now that the issue is closed can the FIXME be fix, or made more specific?