SuccessChanges

Summary

  1. build: workaround stale caches (NFC) (details)
Commit 55eec2ba96bd9c19ccb5d4d13cb8c88d4abcebc6 by Saleem Abdulrasool
build: workaround stale caches (NFC)
`LLVM_DEFAULT_TARGET_TRIPLE` is a cached variable, which means that it
may actually be unset.  Furthermore, in standalone builds, the variable
may be fully undefined.  Apply the regular expression over the empty
string in such a case.  This should improve the state of the green
dragon bot.
The file was modifiedlldb/tools/debugserver/source/MacOSX/CMakeLists.txt