The compiler application is now a dependency.

When building with --enable-native-libs and allowing 'make' to use
multiple threads, the compiler would crash because the erl_syntax
module was missing. Here is the recipe for making it crash on
my computer:

  git clean -dxfq
  MAKEFLAGS='-j10' ./otp_build setup -a --enable-native-libs

What would happen is that when merl_transform was used to compile
itself, it would call 'merl' which in turn would call erl_syntax and
erl_syntax_lib. Since those modules were not listed as dependencies,
there was no guarantee that they had actually been compiled.  In fact,
erl_syntax is a large module so a compilation it with +native would
usually not finish before it was needed for compiling merl_transform.

To ensure that the erl_syntax and erl_syntax_lib modules are
available when needed, they must be explicitly listed as dependencies.

* richcarl/syntax_tools/add-merl:
  Make merl compatible with OTP 18.0
  Add tests for merl in syntax_tools
  Include Merl in Syntax Tools

Applications that use the new erl_anno module are depending on STDLIB 2.5.

Note that CosNotification, Megaco, SNMP, Xmerl, and Parsetools use the
erl_anno module via the Yecc parsers only (the header file in
lib/parsetools/include/yeccpre.hrl calls the erl_anno module).

HiPE does not call the erl_anno module, but uses an exported type.
We have chosen to make HiPE dependent on the erl_anno module.

* richcarl/syntax_tools-remove-mnemosyne:
  Remove Mnemosyne rules support from EDoc
  Remove support for Mnemosyne rules
  Remove support for mnemosyne-style record field access

OTP-12511