ETM: only include oocd_trace.h when tracing enabled.

Fixes build issue on systems that do not have <termios.h>, eg native win32.

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>

src/target/etm.c

@@ -28,7 +28,10 @@
 #include "arm_disassembler.h"
 #include "register.h"
 #include "etm_dummy.h"
+
+#if BUILD_OOCD_TRACE == 1
 #include "oocd_trace.h"
+#endif
 
 
 /*