Add missing clean_doxygen phony targets to the project makefiles.

Projects/AVRISP-MKII/makefile

@@ -753,4 +753,5 @@ $(shell mkdir $(OBJDIR) 2>/dev/null)
 showtarget begin finish end sizebefore sizeafter  \
 gccversion build elf hex eep lss sym coff extcoff \
 program dfu flip flip-ee dfu-ee clean debug       \
-clean_list clean_binary gdb-config doxygen
+clean_list clean_binary clean_doxygen gdb-config  \
+doxygen

Projects/Benito/makefile

@@ -741,4 +741,5 @@ $(shell mkdir $(OBJDIR) 2>/dev/null)
 showtarget begin finish end sizebefore sizeafter  \
 gccversion build elf hex eep lss sym coff extcoff \
 program dfu flip flip-ee dfu-ee clean debug       \
-clean_list clean_binary gdb-config doxygen
+clean_list clean_binary clean_doxygen gdb-config  \
+doxygen

Projects/Incomplete/MIDIToneGenerator/makefile

@@ -735,4 +735,5 @@ $(shell mkdir $(OBJDIR) 2>/dev/null)
 showtarget begin finish end sizebefore sizeafter  \
 gccversion build elf hex eep lss sym coff extcoff \
 program dfu flip flip-ee dfu-ee clean debug       \
-clean_list clean_binary gdb-config doxygen
+clean_list clean_binary clean_doxygen gdb-config  \
+doxygen

Projects/Incomplete/StandaloneProgrammer/makefile

@@ -745,4 +745,5 @@ $(shell mkdir $(OBJDIR) 2>/dev/null)
 showtarget begin finish end sizebefore sizeafter  \
 gccversion build elf hex eep lss sym coff extcoff \
 program dfu flip flip-ee dfu-ee clean debug       \
-clean_list clean_binary gdb-config doxygen
+clean_list clean_binary clean_doxygen gdb-config  \
+doxygen

Projects/LEDNotifier/makefile

@@ -736,4 +736,5 @@ $(shell mkdir $(OBJDIR) 2>/dev/null)
 showtarget begin finish end sizebefore sizeafter  \
 gccversion build elf hex eep lss sym coff extcoff \
 program dfu flip flip-ee dfu-ee clean debug       \
-clean_list clean_binary gdb-config doxygen
+clean_list clean_binary clean_doxygen gdb-config  \
+doxygen

Projects/Magstripe/makefile

@@ -746,4 +746,5 @@ $(shell mkdir $(OBJDIR) 2>/dev/null)
 showtarget begin finish end sizebefore sizeafter  \
 gccversion build elf hex eep lss sym coff extcoff \
 program dfu flip flip-ee dfu-ee clean debug       \
-clean_list clean_binary gdb-config doxygen
+clean_list clean_binary clean_doxygen gdb-config  \
+doxygen

Projects/MissileLauncher/makefile

@@ -735,4 +735,5 @@ $(shell mkdir $(OBJDIR) 2>/dev/null)
 showtarget begin finish end sizebefore sizeafter  \
 gccversion build elf hex eep lss sym coff extcoff \
 program dfu flip flip-ee dfu-ee clean debug       \
-clean_list clean_binary gdb-config doxygen
+clean_list clean_binary clean_doxygen gdb-config  \
+doxygen

Projects/RelayBoard/makefile

@@ -734,4 +734,5 @@ $(shell mkdir $(OBJDIR) 2>/dev/null)
 showtarget begin finish end sizebefore sizeafter  \
 gccversion build elf hex eep lss sym coff extcoff \
 program dfu flip flip-ee dfu-ee clean debug       \
-clean_list clean_binary gdb-config doxygen
+clean_list clean_binary clean_doxygen gdb-config  \
+doxygen

Projects/TemperatureDataLogger/makefile

@@ -747,4 +747,5 @@ $(shell mkdir $(OBJDIR) 2>/dev/null)
 showtarget begin finish end sizebefore sizeafter  \
 gccversion build elf hex eep lss sym coff extcoff \
 program dfu flip flip-ee dfu-ee clean debug       \
-clean_list clean_binary gdb-config doxygen
+clean_list clean_binary clean_doxygen gdb-config  \
+doxygen

Projects/USBtoSerial/makefile

@@ -736,4 +736,5 @@ $(shell mkdir $(OBJDIR) 2>/dev/null)
 showtarget begin finish end sizebefore sizeafter  \
 gccversion build elf hex eep lss sym coff extcoff \
 program dfu flip flip-ee dfu-ee clean debug       \
-clean_list clean_binary gdb-config doxygen
+clean_list clean_binary clean_doxygen gdb-config  \
+doxygen

Projects/Webserver/makefile

@@ -760,4 +760,5 @@ $(shell mkdir $(OBJDIR) 2>/dev/null)
 showtarget begin finish end sizebefore sizeafter  \
 gccversion build elf hex eep lss sym coff extcoff \
 program dfu flip flip-ee dfu-ee clean debug       \
-clean_list clean_binary gdb-config doxygen
+clean_list clean_binary clean_doxygen gdb-config  \
+doxygen

Projects/XPLAINBridge/makefile

@@ -756,4 +756,5 @@ $(shell mkdir $(OBJDIR) 2>/dev/null)
 showtarget begin finish end sizebefore sizeafter  \
 gccversion build elf hex eep lss sym coff extcoff \
 program dfu flip flip-ee dfu-ee clean debug       \
-clean_list clean_binary gdb-config doxygen
+clean_list clean_binary clean_doxygen gdb-config  \
+doxygen