Cleanup LevelDB library dependencies

configure.ac

@@ -328,6 +328,14 @@ AC_TRY_COMPILE([#include <sys/socket.h>],
  [ AC_MSG_RESULT(no)]
 )
 
+LEVELDB_CPPFLAGS=
+LIBLEVELDB=
+LIBMEMENV=
+AM_CONDITIONAL([EMBEDDED_LEVELDB],[true])
+AC_SUBST(LEVELDB_CPPFLAGS)
+AC_SUBST(LIBLEVELDB)
+AC_SUBST(LIBMEMENV)
+
 if test x$enable_wallet != xno; then
     dnl Check for libdb_cxx only if wallet enabled
     BITCOIN_FIND_BDB48