Fixes:
error: constexpr variable 'kHostAltSigStackSize' must be initialized by a constant expression
Gbp-Pq: Name 0016-Remove-constexpr.patch
// handler or do a stack unwind, this is too small. We allocate 32K
// instead of the minimum signal stack size.
// TODO: We shouldn't do logging (with locks) in signal handlers.
-static constexpr int kHostAltSigStackSize =
+static int kHostAltSigStackSize =
32 * KB < MINSIGSTKSZ ? MINSIGSTKSZ : 32 * KB;
void Thread::SetUpAlternateSignalStack() {