No bug - Update media/libnestegg's README_MOZILLA to point to correct git commit. DONTBUILD

--HG--
extra : rebase_source : bb122043b1839c206ea00512bd8ed7744f60a724

media/libnestegg/README_MOZILLA

@@ -5,4 +5,4 @@ Makefile.in build files for the Mozilla build system.
 
 The nestegg git repository is: git://github.com/kinetiknz/nestegg.git
 
-The git commit ID used was ef45a1c3a6b86ce3d86d179537e94c57008f07f4.
+The git commit ID used was a4dd140a8c1073d8d5ef7848f83730e12bdfcf18.