adapt doxygen to INSTDIR

Change-Id: Iedb7f0c8e598b6b4387b0622ae5d8804a03eabb3

odk/CustomTarget_doxygen.mk

@@ -29,7 +29,7 @@ odk_INCFILELIST := com/sun/star/uno/Any.h \
 
 # Cygwin Doxygen needs unix paths
 DOXY_INPUT := $(SRCDIR)/odk/pack/gendocu/main.dox $(SRCDIR)/sal/inc/sal/log-areas.dox \
-	$(addprefix $(OUTDIR)/inc/,$(odk_INCDIRLIST) $(odk_INCFILELIST))
+	$(addprefix $(INSTDIR)/$(gb_Package_SDKDIRNAME)/include/,$(odk_INCDIRLIST) $(odk_INCFILELIST))
 DOXY_INPUT := $(if $(filter WNT,$(OS)),$(shell cygpath -u $(DOXY_INPUT)),$(DOXY_INPUT))
 DOXY_WORKDIR := $(if $(filter WNT,$(OS)),$(shell cygpath -u $(odk_WORKDIR)/docs/cpp/ref),$(odk_WORKDIR)/docs/cpp/ref)
 DOXY_STRIP_PATH := $(if $(filter WNT,$(OS)),$(shell cygpath -u $(OUTDIR)/inc),$(OUTDIR)/inc)