ssc-sysstate-driver: add Module.symvers path

Make sure that the sysstate driver finds the Module.symvers file of the
broker driver.

Signed-off-by: Stefan Eichenberger <eichest@gmail.com>

recipes-kernel/ssc-sysstate-driver/ssc-sysstate-driver_git.bb

@@ -22,3 +22,14 @@ SRC_URI = "\
     "
 
 S = "${WORKDIR}/git"
+SSC_KBUILD_EXTRA_SYMBOLS = "${STAGING_INCDIR}/ssc-broker-driver/Module.symvers"
+
+python __anonymous () {
+    depends = d.getVar('DEPENDS')
+    extra_symbols = []
+    for dep in depends.split():
+        if dep.startswith("kernel-module-"):
+            extra_symbols.append("${STAGING_INCDIR}/" + dep + "/Module.symvers")
+    extra_symbols.append(d.getVar("SSC_KBUILD_EXTRA_SYMBOLS"))
+    d.setVar('KBUILD_EXTRA_SYMBOLS', " ".join(extra_symbols))
+}