Harden obfs4proxy.exe and snowflake.exe shipped with Tor Browser

Right now we have something like

Checking obfs4proxy.exe for /DYNAMICBASE... FAIL
Checking obfs4proxy.exe for /NXCOMPAT... FAIL
Checking obfs4proxy.exe for /SAFESEH... PASS
Checking /obfs4proxy.exe ImageBase (0x400000 < 4GB)... FAIL

for 64bit versions and a similar output for 32bit ones. We should get rid of the FAILs.

Edited Sep 02, 2020 by Georg Koppen

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