Manual conversion of Baserock's build-essential stratum

This huge commit is a manual conversion, notes on what was
needed:

  o project.conf defines the arch specific stuff which was
    previously hardcoded into YBD, so the stage1 target and target
    etc are all defined by the build-essential project.conf

  o Direct and easy changes for git source representation

  o Added stage1.bst & stage2.bst "stacks", everything built in
    stage2 build-depends on stage1.bst, and the final build-essential
    products build-depend on stage2.bst (note build-depend means
    to depend _only_ for building, not propagated forward).

  o Instead of using host tools we build on the GNOME flatpak
    sdk/platform bundles

  o Some build-essential morph files use $(dirname $(pwd)) for a sysroot,
    which is weird, it means the morph files rely on building at one directory
    below the slash sysroot - in buildstream we build in /buildstream/build
    which is two - had to replace these with $(dirname $(dirname $(pwd))) instead

  o Remove the devices sections from the fhs-dirs elements, not allowed
    to create static device nodes in buildstream.

1 files changed, 38 insertions, 0 deletions

diff --git a/build-essential/stage2-binutils.bst b/build-essential/stage2-binutils.bst
new file mode 100644
index 00000000..a515d5dd
--- /dev/null
+++ b/build-essential/stage2-binutils.bst
@@ -0,0 +1,38 @@
+kind: autotools
+
+sources:
+- kind: git
+  url: upstream:binutils-tarball
+  track: binutils-2.25
+  ref: 5500a97a2ad1735db5b35bc51cfb825c1f4c38df
+
+depends:
+- filename: build-essential/stage1.bst
+  type: build
+- build-essential/stage2-linux-api-headers.bst
+- build-essential/stage2-glibc.bst
+
+variables:
+  prefix: /tools
+
+environment:
+  PATH: /tools/bin:/usr/bin:/bin:/usr/sbin:/sbin
+
+config:
+  configure-commands:
+  - |
+    export STAGE2_SYSROOT="$(dirname $(dirname $(pwd)))"
+    export CXX="%{target-stage1}-g++ --sysroot=$STAGE2_SYSROOT"
+    # binutils has its own embedded libtool, which is old and strips out
+    # `--sysroot`.  Work around by modifying the compiler command to
+    # include the sysroot flag
+    export CC="%{target-stage1}-gcc --sysroot=$STAGE2_SYSROOT"
+    ./configure --prefix="%{prefix}" --disable-nls --disable-werror \
+      --build=$(sh config.guess) \
+      --host=%{target-stage1} \
+      --target=%{target-stage1}
+
+  build-commands:
+  - |
+    export STAGE2_SYSROOT="$(dirname $(dirname $(pwd)))"
+    make