OTP-12845

* bruce/change-license:
  fix errors caused by changed line numbers
  Change license text to APLv2

Opaque types need to be expanded before record field types, otherwise
any() could be used for opaque types.

Remove what it seems redundant checks.

The check that a modified type of a field is a subtype of the declared
type has been moved outside of the expansion of forms to avoid loops.

* legoscia/dialyzer/cache-hipe-binaries/OTP-12779:
  Dialyzer to cache results of HiPE compilation
  Change hipe_bifs:system_crc/1 to hipe_bifs:system_crc/0

Cache the results of native compilation in
$XDG_CACHE_HOME/dialyzer_hipe_cache.  This can reduce the startup time
significantly.

If XDG_CACHE_HOME is unset, it defaults to $HOME/.cache.
See the XDG Base Directory spec for more details:
http://standards.freedesktop.org/basedir-spec/basedir-spec-0.7.html

Under that directory, create a subdirectory called
ARCH-VERSION-CHECKSUM, where ARCH is the HiPE architecture, VERSION is
the HiPE version number, and CHECKSUM is the return value of
hipe_bifs:system_crc/0.

Caching can be disabled by specifying --no_native_cache on the command
line.

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.

* Mention the option 'check_plt' among gui() options.
* No longer check a PLT twice when the analysis type is 'plt_check'.
* No longer raise a case_clause error when checking a PLT finds warnings.

Thanks to James Fish.