src: move trace_event.h include to internal header

Move the include from src/node.h to src/node_internals.h.

trace_event.h is not shipped in binary-only and headers-only tarballs,
making it currently impossible to build add-ons against them.

PR-URL: nodejs#10959
Refs: nodejs/citgm#226 (comment)
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matthew Loring <mattloring@google.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>

src/node.h

@@ -41,7 +41,6 @@
 
 #include "v8.h"  // NOLINT(build/include_order)
 #include "node_version.h"  // NODE_MODULE_VERSION
-#include "tracing/trace_event.h"
 
 #define NODE_MAKE_VERSION(major, minor, patch)                                \
   ((major) * 0x1000 + (minor) * 0x100 + (patch))

src/node_internals.h

@@ -8,6 +8,7 @@
 #include "util-inl.h"
 #include "uv.h"
 #include "v8.h"
+#include "tracing/trace_event.h"
 
 #include <stdint.h>
 #include <stdlib.h>