Moved all packages in core, base, vendor, tests and examples to use new #+ file tag syntax.

core/debug/trace/trace_cpp.odin

@@ -1,5 +1,5 @@
-//+private file
-//+build linux, darwin
+#+private file
+#+build linux, darwin
 package debug_trace
 
 import "base:intrinsics"

core/debug/trace/trace_nil.odin

@@ -1,6 +1,6 @@
-//+build !windows
-//+build !linux
-//+build !darwin
+#+build !windows
+#+build !linux
+#+build !darwin
 package debug_trace
 
 import "base:runtime"

core/debug/trace/trace_windows.odin

@@ -1,5 +1,5 @@
-//+private
-//+build windows
+#+private
+#+build windows
 package debug_trace
 
 import "base:intrinsics"