[llvm-lit] Attribute Error in lit internal shell

[Harini0924]

When using the internal shell with this command LIT_USE_INTERNAL_SHELL=1 an AttributeError is displayed.
Error displayed:

line 1096, in executeScriptInternal
    result.command.args[0] == "@echo"
    ^^^^^^^^^^^^^^^^^^^
AttributeError: 'Seq' object has no attribute 'args'

Fixed this issue by adding the REQUIRES: shell directive because these tests use features that run commands in the background with &, which is not supported with lit's internal shell.

Files with failures in BOLT:

• bolt/test/permission.test

Files with failures in compiler-rt:

• compiler-rt/test/fuzzer/fork-sigusr.test
• compiler-rt/test/fuzzer/merge-sigusr.test
• compiler-rt/test/fuzzer/sigint.test
• compiler-rt/test/fuzzer/sigusr.test

[llvmbot]

@llvm/issue-subscribers-bolt

Author: None (Harini0924)

The `executeScriptInternal` function in the lit’s `TestRunner.py` needs modification to address an `AttributeError` occurring in multiple test cases, particularly those related to BOLT and libFuzzer. The error indicates that the result.command object, a `Seq` object, is being accessed incorrectly as if it had an args attribute. Error displayed: ``` line 1096, in executeScriptInternal result.command.args[0] == "@echo" ^^^^^^^^^^^^^^^^^^^ AttributeError: 'Seq' object has no attribute 'args' ```