LinuxEmulation: Moves guest signal frame generation to its own file

No functional change, just moving the code.

This is entirely freestanding from the rest of the signal delegator
handling and mostly gets in the way when I'm working with the rest of
the signal handling. Separate it out to improve readability.

Source/Tools/LinuxEmulation/CMakeLists.txt

@@ -13,6 +13,7 @@ set (SRCS
   LinuxSyscalls/SyscallsSMCTracking.cpp
   LinuxSyscalls/SyscallsVMATracking.cpp
   LinuxSyscalls/ThreadManager.cpp
+  LinuxSyscalls/SignalDelegator/GuestFramesManagement.cpp
   LinuxSyscalls/Utils/Threads.cpp
   LinuxSyscalls/x32/Syscalls.cpp
   LinuxSyscalls/x32/EPoll.cpp