Changed the X64 gasket so it would be possible to port it to deal with the Unix to EFI ABI mangling. It still just does Unix ABI, and has some Xcode specific stuff to make source level debug a little easier, but it is a good first step.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10689 6f19259b-4bc3-4df7-8a09-765794883524

UnixPkg/Sec/SecMain.inf

@@ -34,9 +34,9 @@
   UnixThunk.c
   FwVol.c
   SecMain.c
-  Gasket.c
   
 [Sources.Ia32]  
+  Gasket.c
   Ia32/Gasket.S
   Ia32/Stack.S
   Ia32/SwitchStack.c
@@ -44,6 +44,10 @@
 [Sources.X64]  
   X64/Gasket.S
   X64/SwitchStack.S
+  X64/NameManglingFix.c
+  
+# Only used to help construct Gasket.S
+#  X64/GasketEfiTemplate.c
 
 [Packages]
   MdePkg/MdePkg.dec