* stacks: add a stack for devtools on darwin
After getting this whole mess building on darwin, let's keep it that
way, and maybe make it so we have some non-ML darwin binaries in spack
as well.
* reuse: false for devtools
* dtc: fix darwin dylib name and id
On mac the convention is `lib<name>.<num>.dylib`, while the makefile
creates a num suffixed one by default. The id in the file is also a
local name rather than rewritten to the full path, this fixes both
problems.
* node-js: make whereis more deterministic
* relocation(darwin): catch Mach-O load failure
The MachO library can throw an exception rather than return no headers,
this happened in an elf file in the test data of go-bootstrap. Trying
catching the exception and moving on for now. May also need to look
into why we're trying to rewrite an elf file.
* qemu: add darwin flags to clear out warnings
There's a build failure for qemu in CI, but it's invisible because of
the immense mass of warning output. Explicitly specify the target macos
version and remove the extraneous unknown-warning-option flag.
* dtc: libyaml is also a link dependency
libyaml is required at runtime to run the dtc binary, lack of it caused
the ci for qemu to fail when the library wasn't found.