erts: Move compiler flags generation

Move the call to utils/make_compiler_flags to after _create_dirs
to make sure that the dirs are created before we try to generate files
in there. This seems to work with parallel make as well, but I cannot
find any documentation that says that it should or should not work.
erts: Fix resolve of generated files for depend
Support maps in cover
Handle nonempty list types in docgen_edoc_xml_cb
Handle map types in docgen_edoc_xml_cb
Add systemd socket activation for epmd.

Check for systemd libraries and headers in confgiure.
Add -systemd option enabling waiting for sockets from systemd.
ASSERT that GC is not tried with "need" when GC is disabled
Add tests for the HiPE compiler (Part 1: binaries and bitstrings)

Create tests for the HiPE native code compiler. This is the first
part of the effort and contains tests that check that the native
code produced by the HiPE compiler for binaries and bitstrings is
OK and behaves similarly to the code produced by the BEAM compiler.
Add a Makefile for the HiPE tests
Add check so that tests are skipped if HiPE is not available
Up the time limit (globally) for some slow machines
Correct a contract in the igor module

Thanks Kostis.
Merge branch 'hb/syntax_tools/correct_igor_contract'

* hb/syntax_tools/correct_igor_contract:
  Correct a contract in the igor module
Merge branch 'kostis/hipe-tests-bs/OTP-11748'

* kostis/hipe-tests-bs/OTP-11748:
  Up the time limit (globally) for some slow machines
  Add check so that tests are skipped if HiPE is not available
  Add a Makefile for the HiPE tests
  Add tests for the HiPE compiler (Part 1: binaries and bitstrings)
ssl: Prepare for release
Merge branch 'ia/ssl/prepare-for-release'

* ia/ssl/prepare-for-release:
  ssl: Prepare for release
erts: Fix heap overwrite by hipe "trap frames" when GC is disabled

by trapping BIFs like term_to_binary and binary_to_term.
Merge branch 'sverk/hipe-disable-gc-bug'

* sverk/hipe-disable-gc-bug:
  erts: Fix heap overwrite by hipe "trap frames" when GC is disabled
  ASSERT that GC is not tried with "need" when GC is disabled
eldap: Prepare for release
inets: Prepare for release