[lit] Fix the missing comma in LIT config (llvm#162998)

This pull request makes a minor fix to the
`llvm/utils/lit/lit/llvm/config.py` file.

The change corrects a missing comma in the list of environment
variables, ensuring that `"UBSAN_SYMBOLIZER_PATH"` and `"ASAN_OPTIONS"`
are treated as separate entries instead of a single concatenated string.

* Fixed a missing comma between `"UBSAN_SYMBOLIZER_PATH"` and
`"ASAN_OPTIONS"` in the environment variable list in
`llvm/utils/lit/lit/llvm/config.py`, preventing potential configuration
issues.

Author: Camsyn

llvm/utils/lit/lit/llvm/config.py

@@ -85,7 +85,8 @@ def __init__(self, lit_config, config):
                 "HWASAN_SYMBOLIZER_PATH",
                 "MSAN_SYMBOLIZER_PATH",
                 "TSAN_SYMBOLIZER_PATH",
-                "UBSAN_SYMBOLIZER_PATH" "ASAN_OPTIONS",
+                "UBSAN_SYMBOLIZER_PATH",
+                "ASAN_OPTIONS",
                 "HWASAN_OPTIONS",
                 "MSAN_OPTIONS",
                 "RTSAN_OPTIONS",