Fix Javascript examples so that "make clean" works properly with node

- Need to copy example.cxx to build directory so that build products
  end up in the right place; use a gyp command expansion to do so

.gitignore

@@ -124,6 +124,7 @@ Examples/test-suite/tcl/*/
 Examples/test-suite/uffi/*/
 *_wrap.c
 *_wrap.cxx
+*-gypcopy.cxx
 
 # C# generated files
 *_runme.exe.mdb

Examples/Makefile.in

@@ -730,7 +730,7 @@ javascript_clean:
 	rm -f *_wrap* $(RUNME)
 	rm -f core @EXTRA_CLEAN@
 	rm -f *.@OBJEXT@ *@JSSO@ *.$(SO)
-	rm -f binding.gyp
+	rm -f binding.gyp example-gypcopy.cxx
 	cd $(ROOT_DIR)/Tools/javascript && $(MAKE) -s clean
 
 ##################################################################

Examples/javascript/class/binding.gyp.in

@@ -2,7 +2,7 @@
   "targets": [
     {
       "target_name": "example",
-      "sources": [ "$srcdir/example.cxx", "example_wrap.cxx" ],
+      "sources": [ "<!(cp $srcdir/example.cxx example-gypcopy.cxx && echo example-gypcopy.cxx)", "example_wrap.cxx" ],
       "include_dirs": ["$srcdir"]
     }
   ]

Examples/javascript/enum/binding.gyp.in

@@ -2,7 +2,7 @@
   "targets": [
     {
       "target_name": "example",
-      "sources": [ "$srcdir/example.cxx", "example_wrap.cxx" ],
+      "sources": [ "<!(cp $srcdir/example.cxx example-gypcopy.cxx && echo example-gypcopy.cxx)", "example_wrap.cxx" ],
       "include_dirs": ["$srcdir"]
     }
   ]

Examples/javascript/exception/binding.gyp.in

@@ -2,7 +2,7 @@
   "targets": [
     {
       "target_name": "example",
-      "sources": [ "$srcdir/example.cxx", "example_wrap.cxx" ],
+      "sources": [ "<!(cp $srcdir/example.cxx example-gypcopy.cxx && echo example-gypcopy.cxx)", "example_wrap.cxx" ],
       "include_dirs": ["$srcdir"],
       'defines': [
         'BUILDING_NODE_EXTENSION=1',

Examples/javascript/pointer/binding.gyp.in

@@ -2,7 +2,7 @@
   "targets": [
     {
       "target_name": "example",
-      "sources": [ "$srcdir/example.cxx", "example_wrap.cxx" ],
+      "sources": [ "<!(cp $srcdir/example.cxx example-gypcopy.cxx && echo example-gypcopy.cxx)", "example_wrap.cxx" ],
       "include_dirs": ["$srcdir"]
     }
   ]

Examples/javascript/reference/binding.gyp.in

@@ -2,7 +2,7 @@
   "targets": [
     {
       "target_name": "example",
-      "sources": [ "$srcdir/example.cxx", "example_wrap.cxx" ],
+      "sources": [ "<!(cp $srcdir/example.cxx example-gypcopy.cxx && echo example-gypcopy.cxx)", "example_wrap.cxx" ],
       "include_dirs": ["$srcdir"]
     }
   ]

Examples/javascript/simple/binding.gyp.in

@@ -2,7 +2,7 @@
   "targets": [
     {
       "target_name": "example",
-      "sources": [ "$srcdir/example.cxx", "example_wrap.cxx" ],
+      "sources": [ "<!(cp $srcdir/example.cxx example-gypcopy.cxx && echo example-gypcopy.cxx)", "example_wrap.cxx" ],
       "include_dirs": ["$srcdir"]
     }
   ]

Examples/javascript/variables/binding.gyp.in

@@ -2,7 +2,7 @@
   "targets": [
     {
       "target_name": "example",
-      "sources": [ "$srcdir/example.cxx", "example_wrap.cxx" ],
+      "sources": [ "<!(cp $srcdir/example.cxx example-gypcopy.cxx && echo example-gypcopy.cxx)", "example_wrap.cxx" ],
       "include_dirs": ["$srcdir"]
     }
   ]