[compiler-rt] [compiler-rt] Use installed libc++(abi) for tests instead of build tree (PR #115077)

[Alexander Richardson via llvm-commits]

arichardson wrote:

As can be seen from your log: /tmp/tmp.3hBN2EZpSo/repo/llvm/build-all/runtimes/runtimes-x86_64-unknown-linux-gnu-bins/compiler-rt/lib/fuzzer/libcxx_fuzzer_x86_64/include/c++/v1/cstdint
 Should not be used, it should be installing to the build directory instead.

https://github.com/llvm/llvm-project/pull/115077