[OpenMP][libarcher] Allow all possible argument separators in TSAN_OPTIONS

Currently, the parser used to tokenize the TSAN_OPTIONS in libomp uses
only spaces as separators, even though TSAN in compiler-rt supports
other separators like ':' or ','.
CTest uses ':' to separate sanitizer options by default.
The documentation for other sanitizers mentions ':' as separator,
but TSAN only lists spaces, which is probably where this mismatch originated.

Patch provided by  upsj

Differential Revision: https://reviews.llvm.org/D87144