stopwatch.h: add stub file for Linux version. Older versions of the

emulator will also need this stub to compile.

stopwatch.h

@@ -0,0 +1,12 @@
+typedef struct {
+  char          m_bClear;
+}  stopwatch_t;
+
+static stopwatch_t sw_all, sw_fault, sw_ea, sw_mapva, sw_idle, sw_add16, sw_cas, sw_irs, sw_io, sw_zmv, sw_zmvd, sw_zfil, sw_pcl;
+
+#define stopwatch_init(X,Y)
+#define stopwatch_start(X)
+#define stopwatch_stop(X)
+#define stopwatch_report(X)
+#define stopwatch_push(X)
+#define stopwatch_pop(X)