For single config mode (no debug_and_release) extra compilers wouldn't
get added to the vcxproj file.
Single config mode creates a temporary project, and that was incomplete.
Multi config mode, on the other hand, directly operates on the "real
data" and wasn't affected by this problem.
Task-number: QTBUG-69769
Change-Id: I9cd942e43d80adbeac9a3c8fbe1a5766bc9645a0
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
f2668c6b43