Instead of lazily initializing (with some platform exceptions, see the
equivalent qsimd.cpp commit). The rationale is the same as for
qCpuFeatures(): this the qHashBits() function is hot and the current
code generation needs to save a lot of state because of the possible
call to the C++ runtime functions to enable the thread-safe
initialization of the hash seed.
[ChangeLog][Important Behavior Changes] QtCore now initializes the QHash
global seed before the main() function is run, so it is no longer
possible to use qputenv() to affect the seed value for the current
process. Disabling the random global seed for the current process should
be done programmatically with by calling either the 6.2 function
QHashSeed::setDeterministicGlobalSeed() or, if compatibility with Qt 5
is required, by calling qSetGlobalQHashSeed() with value 0.
Change-Id: I54f205f6b7314351b078fffd16cf7eae93f9e27e
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
cc5cc3225d