[libc-commits] [libc] [libc] Add `link.h` and `elf.h` headers (PR #97924)

[LLVM Continuous Integration via libc-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `libc-aarch64-ubuntu-fullbuild-dbg` running on `libc-aarch64-ubuntu` while building `libc` at step 4 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/71/builds/1570

Here is the relevant piece of the build log for the reference:
```
Step 4 (annotate) failure: 'python ../llvm-zorg/zorg/buildbot/builders/annotated/libc-linux.py ...' (failure)
...
[ RUN      ] LlvmLibcLdExpTest.SpecialNumbers
[       OK ] LlvmLibcLdExpTest.SpecialNumbers (6 us)
[ RUN      ] LlvmLibcLdExpTest.PowersOfTwo
[       OK ] LlvmLibcLdExpTest.PowersOfTwo (12 us)
[ RUN      ] LlvmLibcLdExpTest.OverFlow
[       OK ] LlvmLibcLdExpTest.OverFlow (46 us)
[ RUN      ] LlvmLibcLdExpTest.UnderflowToZeroOnNormal
[       OK ] LlvmLibcLdExpTest.UnderflowToZeroOnNormal (4 us)
[ RUN      ] LlvmLibcLdExpTest.UnderflowToZeroOnSubnormal
[       OK ] LlvmLibcLdExpTest.UnderflowToZeroOnSubnormal (3 us)
[ RUN      ] LlvmLibcLdExpTest.NormalOperation
[       OK ] LlvmLibcLdExpTest.NormalOperation (496 us)
Ran 6 tests.  PASS: 6  FAIL: 0
[162/633] Running unit test libc.test.src.math.modf_test.__unit__
[==========] Running 4 tests from 1 test suite.
[ RUN      ] LlvmLibcModfTest.SpecialNumbers
[       OK ] LlvmLibcModfTest.SpecialNumbers (4 us)
[ RUN      ] LlvmLibcModfTest.RoundedNubmers
[       OK ] LlvmLibcModfTest.RoundedNubmers (2 us)
[ RUN      ] LlvmLibcModfTest.Fractions
[       OK ] LlvmLibcModfTest.Fractions (2 us)
[ RUN      ] LlvmLibcModfTest.Range
[       OK ] LlvmLibcModfTest.Range (32 ms)
Ran 4 tests.  PASS: 4  FAIL: 0
[163/633] Running unit test libc.test.src.math.smoke.fminimum_magf_test.__unit__
[==========] Running 5 tests from 1 test suite.
[ RUN      ] LlvmLibcFMinimumMagTest.NaN
[       OK ] LlvmLibcFMinimumMagTest.NaN (3 us)
[ RUN      ] LlvmLibcFMinimumMagTest.InfArg
[       OK ] LlvmLibcFMinimumMagTest.InfArg (2 us)
[ RUN      ] LlvmLibcFMinimumMagTest.NegInfArg
[       OK ] LlvmLibcFMinimumMagTest.NegInfArg (1 us)
[ RUN      ] LlvmLibcFMinimumMagTest.BothZero
[       OK ] LlvmLibcFMinimumMagTest.BothZero (1 us)
[ RUN      ] LlvmLibcFMinimumMagTest.Range
[       OK ] LlvmLibcFMinimumMagTest.Range (23 ms)
Ran 5 tests.  PASS: 5  FAIL: 0
[164/633] Running unit test libc.test.src.math.smoke.fmaximum_numl_test.__unit__
[==========] Running 5 tests from 1 test suite.
[ RUN      ] LlvmLibcFMaximumNumTest.NaN
[       OK ] LlvmLibcFMaximumNumTest.NaN (9 us)
[ RUN      ] LlvmLibcFMaximumNumTest.InfArg
[       OK ] LlvmLibcFMaximumNumTest.InfArg (2 us)
[ RUN      ] LlvmLibcFMaximumNumTest.NegInfArg
[       OK ] LlvmLibcFMaximumNumTest.NegInfArg (1 us)
[ RUN      ] LlvmLibcFMaximumNumTest.BothZero
[       OK ] LlvmLibcFMaximumNumTest.BothZero (2 us)
[ RUN      ] LlvmLibcFMaximumNumTest.Range
[       OK ] LlvmLibcFMaximumNumTest.Range (18 ms)
Ran 5 tests.  PASS: 5  FAIL: 0

```

https://github.com/llvm/llvm-project/pull/97924