update script: fix hdr path when header is in a subdir

Make sure we correctly handle copying headers in a subdir like
tc_act/tc_mirred.h. While at it strip trailing backslash.

Signed-off-by: Jakub Kicinski <[email protected]>

Author: kuba-moo

update-from-kernel.sh

@@ -17,8 +17,8 @@ cp -v ${KSRC}/tools/net/ynl/Makefile.deps	./
 sed -i 's@^UAPI_PATH:=.*@UAPI_PATH:=../include/@' Makefile.deps
 
 mkdir -p include/linux/
-for hdr in $(cat Makefile.deps | sed -n 's/.*,\([^,]*\.h\))/\1/p'); do
-    cp -v  ${KSRC}/include/uapi/linux/$hdr	./include/linux/
+for hdr in $(cat Makefile.deps | sed -n 's/.*,\([^,]*\.h\)).*/\1/p'); do
+    cp -v  ${KSRC}/include/uapi/linux/$hdr	./include/linux/$hdr
 done
 
 mkdir -p lib