Minor makefile edits

makefiles/consts.mk
-------------------
  o Fixed quote-{double,single} macros to use the correct values.

makefiles/include.mk
makefiles/lint/shell.mk
makefiles/virtualenv.mk
-----------------------
  o Inline a visual version string for quick sanity checking.

makefiles/lint/include.mk
makefiles/lint/license/
-------------------------
  o Check license agreements with the reuse command line tool.

Change-Id: I54b247805dc75b888ab5662e224261dabb01eab7
diff --git a/makefiles/lint/urls b/makefiles/lint/urls
new file mode 100644
index 0000000..5694a1b
--- /dev/null
+++ b/makefiles/lint/urls
@@ -0,0 +1,5 @@
+# -*- makefile -*-
+
+https://www.shellcheck.net/wiki/Directive
+
+# [EOF]
\ No newline at end of file