[clang] [Fuchsia] Stack analysis flags for runtimes (PR #175677)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-ppc64le-linux-multistage` running on `ppc64le-clang-multistage-test` while building `clang` at step 10 "build stage 2".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/76/builds/14296

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 10 (build stage 2) failure: 'ninja' (failure) (timed out)
...
[6654/6755] Creating library symlink lib/libclangDaemon.so
[6655/6755] Linking CXX shared library lib/libclangdMain.so.23.0git
[6656/6755] Creating library symlink lib/libclangdMain.so
[6657/6755] Linking CXX shared library lib/libclangDaemonTweaks.so.23.0git
[6658/6755] Creating library symlink lib/libclangDaemonTweaks.so
[6659/6755] Linking CXX executable bin/dexp
[6660/6755] Linking CXX executable bin/clangd-remap
[6661/6755] Linking CXX executable bin/clangd-indexer
[6662/6755] Linking CXX executable bin/clangd-fuzzer
[6663/6755] Linking CXX executable bin/clangd
command timed out: 1200 seconds without output running [b'ninja'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=2152.254623

```

</details>

https://github.com/llvm/llvm-project/pull/175677