mruby: install static libraries and headers

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>

recipes-support/mruby/mruby.bb

@@ -9,4 +9,10 @@ do_configure_prepend() {
     sed -i 's:\#{mrbc_build.build_dir}/bin/mrbc:${STAGING_BINDIR_NATIVE}/mrbc:' ${S}/lib/mruby/build.rb
 }
 
+do_install_append() {
+    # mruby-zest needs our staic libs
+    install -d ${D}/${libdir}
+    cp ${B}/build/host/lib/*.a ${D}/${libdir}
+}
+
 # REVISIT: Check build for big endian machines