Fixup jansson & libusb include paths when using separate build directory
diff --git a/Makefile.am b/Makefile.am
index 0e03d2d..ef64fb6 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,10 +1,10 @@
ACLOCAL_AMFLAGS = -I m4
-JANSSON_INCLUDES= -I$(top_srcdir)/compat/jansson-2.5/src
+JANSSON_INCLUDES= -I$(top_builddir)/compat/jansson-2.5/src -I$(top_srcdir)/compat/jansson-2.5/src
if WANT_USBUTILS
-USBUTILS_INCLUDES = -I$(top_srcdir)/compat/libusb-1.0/libusb
+USBUTILS_INCLUDES = -I$(top_builddir)/compat/libusb-1.0/libusb -I$(top_srcdir)/compat/libusb-1.0/libusb
else
USBUTILS_INCLUDES =
endif