initramfs-debug: add simple init script for debugging

Add a tiny simple debug script that will mount all available virtual
file systems and then execute a shell.

Signed-off-by: Dmitry Eremin-Solenikov <dmitry_eremin@mentor.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-initramfs/recipes-bsp/initrdscripts/initramfs-debug_1.0.bb

@@ -0,0 +1,14 @@
+SUMMARY = "Extremely basic live image init script"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
+SRC_URI = "file://init-debug.sh"
+
+S = "${WORKDIR}"
+
+do_install() {
+        install -m 0755 ${WORKDIR}/init-debug.sh ${D}/init
+}
+
+inherit allarch
+
+FILES_${PN} += " /init "