build: use jinx in the build system

now uses jinx to build a cross toolchain, mlibc, bash and the kernel. also made scheduler temporarily run /usr/bin/bash instead of /sbin/init

recipes/mlibc

@@ -0,0 +1,22 @@
+name=mlibc
+from_source=mlibc
+revision=1
+hostdeps="gcc-cross binutils-cross"
+imagedeps="meson ninja git base-devel binutils"
+allow_network="yes"
+
+
+configure() {
+        meson --cross-file ${base_dir}/util/crossfile --prefix=${prefix} ${source_dir}
+}
+
+build() {
+
+        ninja
+
+}
+
+install() {
+        DESTDIR=${dest_dir} ninja install
+}
+