Don't put our include paths at the end of the include search list.
Otherwise, possibly locally installed includes such as those from libfdt
interfere with those used by UBoot and the compilation is exited with an
error.
diff --git a/tools/Makefile b/tools/Makefile
index 749d994..a7222c2 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -133,9 +133,9 @@
# Use native tools and options
# Define __KERNEL_STRICT_NAMES to prevent typedef overlaps
#
-HOSTCPPFLAGS = -idirafter $(SRCTREE)/include \
- -idirafter $(OBJTREE)/include2 \
- -idirafter $(OBJTREE)/include \
+HOSTCPPFLAGS = -isystem $(SRCTREE)/include \
+ -isystem $(OBJTREE)/include2 \
+ -isystem $(OBJTREE)/include \
-I $(SRCTREE)/lib/libfdt \
-I $(SRCTREE)/tools \
-DTEXT_BASE=$(TEXT_BASE) -DUSE_HOSTCC \
