coccinelle: fix verbose message about .cocci file being run
If you run coccicheck with V=1 and COCCI=, you will see a strange
path to the semantic patch file. For example, run the following:
$ make V=1 COCCI=scripts/coccinelle/free/kfree.cocci coccicheck
[ snip ]
The semantic patch that makes this report is available
in scriptcoccinelle/free/kfree.cocci.
Notice "s/" was dropped from "scripts/coccinelle/free/kfree.cocci".
When running coccicheck without O=, $srctree is expanded to ".", which
represents one arbitrary character in the regular expression. Using
sed is not a good choice here. Strip $srctree/ simply without sed.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Nicolas Palix <nicolas.palix@imag.fr>