Makefile: Use -iquote for adding local libs to include path

With `-I` private headers in hfsfuse's bundled dependencies (ublio,
utf8proc) and core libs can conflict with system provided headers,
as these will also be searched in include directives made within
system headers.

Originally introduced in 8df0c23
and reported in github issue #26

Makefile

@@ -66,7 +66,7 @@ export CONFIG
 
 LIBS = lib/libhfsuser/libhfsuser.a lib/libhfs/libhfs.a
 LIBDIRS = $(abspath $(dir $(LIBS)))
-INCLUDE = $(foreach lib,$(LIBDIRS),-I$(lib))
+INCLUDE = $(foreach lib,$(LIBDIRS),-iquote $(lib))
 
 ifneq ($(WITH_UBLIO), none)
 	APP_FLAGS += -DHAVE_UBLIO