component/quickjs: adds quickjs to component

defines 'configure-command = true' because configure script does not exist

component/quickjs/buildout.cfg

+[buildout]
+extends =
+  ../xz-utils/buildout.cfg
+parts = quickjs
+
+[quickjs]
+recipe = slapos.recipe.cmmi
+configure-command = true
+url = https://bellard.org/quickjs/quickjs-2020-09-06.tar.xz
+md5sum = 47cb6def3263d6a631b647b268b1c554
+environment =
+  PATH=${xz-utils:location}/bin:%(PATH)s