Fix sanitizer tool list used to generate sanitizer_common tests to be up-to-date.

Summary:
This replaces the sanitizer tool list (used for generating
sanitizer_common configurations) with a tool list derived from
existing build system information.

Previously sanitizer_common had its own list of supported sanitizer
tools. This was bad because it was out of sync with the rest of the
build system. Notably it meant that the sanitizer_common runtime was
only being tested on Darwin the ASan dylib and not the other sanitizer
dylibs that are built for Darwin (LSan, TSan, and UBSan).

Unfortunately enabling the tests against other sanitizer dylibs has lead
to some test failures on Darwin. For now they've been marked as
XFAIL until the failures can investigated properly.

For Windows and Android we use the old sanitizer tool list to try avoid
bot breakages.

rdar://problem/47143078

Reviewers: kubamracek, george.karpenkov, yln, samsonov, vitalybuka, krytarowski

Subscribers: srhines, mgorny, fedor.sergeev, #sanitizers, llvm-commits

Differential Revision: https://reviews.llvm.org/D55740

llvm-svn: 351398