- Copy stable/10@285827 to releng/10.2 in preparation for 10.2-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.2.
- Update default pkg(8) configuration to use the quarterly branch.[1]

Discussed with: re, portmgr [1]
Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r271931:

Add a few missing llvm/clang patches, update the other ones to be able
to apply with the same patch options onto a fresh upstream llvm/clang
3.4.1 checkout, and use approximately the same header tempate for them.

MFC Clang debug info crash fix

r271282: Merge Clang debug info crash fix rev 200797:

Debug info: fix a crasher when when emitting debug info for
not-yet-completed templated types. getTypeSize() needs a complete type.

rdar://problem/15931354

r271283: Add clang patch for r271282

Note that r271282 contains only the src change from Clang rev 200797.
This patch file includes two follow-on changes to the test case, which
do not apply to the copy in the FreeBSD tree.

Upstream Clang revisions:

200797:

Debug info: fix a crasher when when emitting debug info for
not-yet-completed templated types. getTypeSize() needs a complete type.

rdar://problem/15931354

200798:

Simplify testcase from r200797 some more.

200805:

Further simplify r200797 and add an explanatory comment.

PR: 193347
Approved by: re
Sponsored by: DARPA, AFRL

Add clang patch for r271282

Note that r271282 contains only the src change from Clang rev 200797.
This patch file includes two follow-on changes to the test case, which
do not apply to the copy in the FreeBSD tree.

Upstream Clang revisions:

200797:

Debug info: fix a crasher when when emitting debug info for
not-yet-completed templated types. getTypeSize() needs a complete type.

rdar://problem/15931354

200798:

Simplify testcase from r200797 some more.

200805:

Further simplify r200797 and add an explanatory comment.

PR: 193347
MFC after: 3 days
Sponsored by: DARPA, AFRL