add usb audio, cdc, and midi stub files for doxy

- add stub files to relevant makefiles
- include <stdint.h> in respective headers to fix compilation

lib/stm32/f0/Makefile

@@ -56,6 +56,7 @@ OBJS += usart_common_all.o usart_common_v2.o
 
 OBJS += usb.o usb_control.o usb_standard.o usb_msc.o
 OBJS += usb_hid.o
+OBJS += usb_audio.o usb_cdc.o usb_midi.o
 OBJS += st_usbfs_core.o st_usbfs_v2.o
 
 VPATH += ../../usb:../:../../cm3:../common

lib/stm32/f1/Makefile

@@ -57,6 +57,7 @@ OBJS += phy.o phy_ksz80x1.o
 
 OBJS += usb.o usb_control.o usb_standard.o usb_msc.o
 OBJS += usb_hid.o
+OBJS += usb_audio.o usb_cdc.o usb_midi.o
 OBJS += usb_dwc_common.o usb_f107.o
 OBJS += st_usbfs_core.o st_usbfs_v1.o
 

lib/stm32/f2/Makefile

@@ -54,6 +54,7 @@ OBJS += usart_common_all.o usart_common_f124.o
 
 OBJS += usb.o usb_standard.o usb_control.o usb_msc.o
 OBJS += usb_hid.o
+OBJS += usb_audio.o usb_cdc.o usb_midi.o
 OBJS += usb_dwc_common.o usb_f107.o usb_f207.o
 
 VPATH += ../../usb:../:../../cm3:../common

lib/stm32/f3/Makefile

@@ -55,6 +55,7 @@ OBJS += usart_common_v2.o usart_common_all.o
 
 OBJS += usb.o usb_control.o usb_standard.o usb_msc.o
 OBJS += usb_hid.o
+OBJS += usb_audio.o usb_cdc.o usb_midi.o
 OBJS += st_usbfs_core.o st_usbfs_v1.o
 
 VPATH += ../../usb:../:../../cm3:../common

lib/stm32/f4/Makefile

@@ -66,6 +66,7 @@ OBJS += usart_common_all.o usart_common_f124.o
 
 OBJS += usb.o usb_standard.o usb_control.o usb_msc.o
 OBJS += usb_hid.o
+OBJS += usb_audio.o usb_cdc.o usb_midi.o
 OBJS += usb_dwc_common.o usb_f107.o usb_f207.o
 
 OBJS += mac.o phy.o mac_stm32fxx7.o phy_ksz80x1.o

lib/stm32/l0/Makefile

@@ -55,6 +55,7 @@ OBJS += usart_common_all.o usart_common_v2.o
 
 OBJS += usb.o usb_control.o usb_standard.o usb_msc.o
 OBJS += usb_hid.o
+OBJS += usb_audio.o usb_cdc.o usb_midi.o
 OBJS += st_usbfs_core.o st_usbfs_v2.o
 
 VPATH += ../../usb:../:../../cm3:../common

lib/stm32/l1/Makefile

@@ -54,6 +54,7 @@ OBJS += usart_common_all.o usart_common_f124.o
 
 OBJS += usb.o usb_control.o usb_standard.o usb_msc.o
 OBJS += usb_hid.o
+OBJS += usb_audio.o usb_cdc.o usb_midi.o
 OBJS += st_usbfs_core.o st_usbfs_v1.o
 
 VPATH += ../../usb:../:../../cm3:../common

lib/stm32/l4/Makefile

@@ -57,6 +57,7 @@ OBJS += usart_common_all.o usart_common_v2.o
 
 OBJS += usb.o usb_control.o usb_standard.o usb_msc.o
 OBJS += usb_hid.o
+OBJS += usb_audio.o usb_cdc.o usb_midi.o
 OBJS += st_usbfs_core.o st_usbfs_v2.o
 OBJS += usb_dwc_common.o usb_f107.o