Some more file/path restructuring.

All #includes now explicitly use the "<libopencm3/stm32/rcc.h>" format.
If you want to get rid of the "libopencm3" prefix in your local project you
can add a respective -I entry in your Makefile (not recommended though).

All .ld files and .a libs are installed in $(TOOLCHAIN_DIR)/lib
directly (as before), but are now renamed to avoid potential
conflicts now or in the future. Examples:

  libopencm3_lpc13xx.a
  libopencm3_lpc13xx.ld
  libopencm3_stm32.a
  libopencm3_stm32.ld

examples/stm32/other/usb_hid/usbhid.c

@@ -18,18 +18,18 @@
  */
 
 #include <stdlib.h>
-#include <stm32/rcc.h>
-#include <stm32/gpio.h>
-#include <stm32/systick.h>
-#include <usb/usbd.h>
-#include <usb/hid.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+#include <libopencm3/stm32/systick.h>
+#include <libopencm3/usb/usbd.h>
+#include <libopencm3/usb/hid.h>
 
 /* Define this to include the DFU APP interface. */
 #define INCLUDE_DFU_INTERFACE
 
 #ifdef INCLUDE_DFU_INTERFACE
-#include <stm32/scb.h>
-#include <usb/dfu.h>
+#include <libopencm3/stm32/scb.h>
+#include <libopencm3/usb/dfu.h>
 #endif
 
 const struct usb_device_descriptor dev = {

examples/stm32/other/usb_hid/usbhid.ld

@@ -25,5 +25,5 @@ MEMORY
 }
 
 /* Include the common ld script. */
-INCLUDE stm32.ld
+INCLUDE libopencm3_stm32.ld