sys_rwlock_wlock: Fix typo and more fixes

[elad335]

• sys_rwlock_wlock was removing readers instead of adding new ones on last writer quit event after timeout.
• Fix commands enqueuing on SPU LLVM, tsx path. (regarding mfc_fence/barrier)
• Improve kernel explorer's onject name extractor (nam64) by terminating string in a compatible way for all byte endianesses.
• Correct alignment of lv2 sync objects' attributes structs, by fixing alignment of name. (should be 1 instead of 8)
• Fix sys_config event id reset by using fxo instead of s static variable.
• Replace unjastified use of idm::import_existing in sys_config with idm::make_ptr.