distro/yocto: add meta-salmanoff Yocto layer for QEMU x86 images

Vendor the BitBake layer (recipes, network config, boost pin, kernel
append, runqemu bridge script) alongside SMO for packaging as a Yocto image.

Co-authored-by: Cursor <cursoragent@cursor.com>

distro/yocto/meta-salmanoff/recipes-support/rseqsliceprobe/rseqsliceprobe.bb

@@ -0,0 +1,15 @@
+SUMMARY = "Probe kernel RSeq timeslice extension"
+LICENSE = "CLOSED"
+
+SRC_URI = "file://rseqsliceprobe.cpp"
+
+S = "${UNPACKDIR}"
+
+do_compile() {
+    ${CXX} ${CXXFLAGS} ${LDFLAGS} ${S}/rseqsliceprobe.cpp -o rseqsliceprobe
+}
+
+do_install() {
+    install -d ${D}${bindir}
+    install -m 0755 rseqsliceprobe ${D}${bindir}/rseqsliceprobe
+}