r224389: Linker: Drop superseded subprograms

[Duncan P. N. Exon Smith]

Alexey, my commit in r224389 caused some failures on your bot:

http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-bootstrap/builds/5325

Any chance you can send me the preprocessed files (or attach them to PR21910)?

Here are a couple of them:

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-3.6: note: diagnostic msg: /tmp/CIndexDiagnostic-4357f4.cpp
clang-3.6: note: diagnostic msg: /tmp/CIndexDiagnostic-4357f4.sh
clang-3.6: note: diagnostic msg: 


PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-3.6: note: diagnostic msg: /tmp/CIndexInclusionStack-72464a.cpp
clang-3.6: note: diagnostic msg: /tmp/CIndexInclusionStack-72464a.sh
clang-3.6: note: diagnostic msg: 

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-3.6: note: diagnostic msg: /tmp/CIndexHigh-0b2b52.cpp
clang-3.6: note: diagnostic msg: /tmp/CIndexHigh-0b2b52.sh
clang-3.6: note: diagnostic msg: 

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-3.6: note: diagnostic msg: /tmp/CIndexCodeCompletion-88b2a8.cpp
clang-3.6: note: diagnostic msg: /tmp/CIndexCodeCompletion-88b2a8.sh
clang-3.6: note: diagnostic msg: 

They all have the same backtrace, so really any one should be
sufficient.

Thanks!