security/trousers: fix security issues

Fix three security issues in security/trousers:

• CVE-2020-24332 If the tcsd daemon is started with root privileges, the creation of the system.data file is prone to symlink attacks

• CVE-2020-24330 If the tcsd daemon is started with root privileges, it fails to drop the root gid after it is no longer needed

• CVE-2020-24331 If the tcsd daemon is started with root privileges, the tss user has read and write access to the /etc/tcsd.conf file

Add patches to fix potential use-after-free
Fix build with -fno-common

MFH: 2020Q3
Security: e37a0a7b-e1a7-11ea-9538-0c9d925bbbc0