Set $ORIGIN based rpath on shared linux binaries

scripts.d/99-rpath.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+ffbuild_enabled() {
+    [[ $TARGET == linux* ]]
+}
+
+ffbuild_dockerfinal() {
+    return 0
+}
+
+ffbuild_dockerlayer() {
+    return 0
+}
+
+ffbuild_dockerstage() {
+    return 0
+}
+
+ffbuild_dockerbuild() {
+    return 0
+}
+
+ffbuild_configure() {
+    if [[ $VARIANT == *shared* ]]; then
+        # Can't escape escape hell
+        echo --extra-ldexeflags=\'-Wl,-rpath='\\\\\\\$\\\$ORIGIN'\\ -Wl,-rpath='\\\\\\\$\\\$ORIGIN/../lib'\'
+    fi
+}