Bug#816468: small memory leak fix

[Carsten Janssen]

Package: patchelf
Version: 0.9

A user on Github mentioned a small memory leak fix. Maybe you want to 
apply that to the Debian package.
https://github.com/NixOS/patchelf/pull/67#issuecomment-190199386
https://github.com/NixOS/patchelf/pull/67#issuecomment-190199386

--- a/src/patchelf.cc
+++ b/src/patchelf.cc
@@ -1612,6 +1612,7 @@
     fileName = argv[i];
 
     patchElf();
+    if (contents) free(contents);
 
     return 0;
 }