change #include "arm7_9_common.h" to <target/arm7_9_common.h>

Changes from the flat namespace to heirarchical one.  Instead of writing:

	#include "arm7_9_common.h"

the following form should be used.

	#include <target/arm7_9_common.h>

The exception is from .c files in the same directory.

src/flash/nor/str9xpec.c

@@ -25,7 +25,7 @@
 #endif
 
 #include "str9xpec.h"
-#include "arm7_9_common.h"
+#include <target/arm7_9_common.h>
 
 
 static int str9xpec_erase_area(struct flash_bank *bank, int first, int last);

src/target/embeddedice.h

@@ -26,7 +26,7 @@
 #ifndef EMBEDDED_ICE_H
 #define EMBEDDED_ICE_H
 
-#include "arm7_9_common.h"
+#include <target/arm7_9_common.h>
 
 enum
 {