In the master branch, the encoding for most xml files have been
changed from latin-1 to utf-8. The problem is, that the corresponding
files in the maint branch still are encoded in latin-1, and that
a merge from maint to master may bring in characters encoded in latin-1
into a notes.xml file declared to be in utf-8.

To fix the problem once and for all (for the files involved), we'll
need to re-encode the files files utf-8 in maint, and then merge to
master.

Noticed-by: Magnus Henoch

* ks/hipe-cleanup-escaping/OTP-11031:
  Loosen the assumptions of code that handles escaping functions

The HiPE compiler implicitly relied on the assumption that a function
will never appear as both exported and also used as function closure.
This was true because the BEAM compiler prior to R16B created module
local anonymous functions for each closure. A proposed change to the
BEAM compiler invalidates this invariant, so in order to accommodate
for this change there needs to be a change of how the set of possibly
escaping functions is computed.

While doing this, the code was simplified by taking out a boolean()
tag that indicated whether a function is a closure or exported and
also slightly cleaned up the affected modules.

Prior to R16B, the bs_match_string instruction worked only for cases
that had a destination variable. As shown by the example below, this
is not always the case and the Dst list can be empty.

  test(<<42, _/bits>> = B) -> B.

This fixes a bug reported by Loïc Hoguin (02/12/2013); the original
post used a different code example to illustrate the problem.

While revising the code, a significant clean up was also performed.