Revert "Change %{nodejs_sitelib} to nonversion/shared path (rhbz#2404685)"

Let's not break already branched Fedoras.

This reverts commit 4e33741bc9.

macros.nodejs

@@ -1,8 +1,12 @@
 # nodejs binary
 %__nodejs %{_bindir}/node
 
+# currently installed nodejs version
+%nodejs_version %(%{__nodejs} -v | sed s/v//)
+%_nodejs_major_version %(echo %{nodejs_version} | sed 's#^\\([0-9]\\+\\).*#\\1#')
+
 # nodejs library directory
-%nodejs_sitelib %{_prefix}/lib/node_modules
+%nodejs_sitelib %{_prefix}/lib/node_modules_%{_nodejs_major_version}
 
 #arch specific library directory
 #for future-proofing only; we don't do multilib