libebl: Allow SHT_NOTE as relocation target type.

eu-elflint uses ebl_check_reloc_target_type to determine whether a section
is a valid relocation target. In Fedora rawhide there are new ELF notes
(annobin) which have relocations against them in ET_REL files. eu-elflint
currently flags these as invalid. It looks like that is not correct.
I cannot find any reason an SHT_NOTE section cannot have relocations
against it. So this patch allows them.

Signed-off-by: Mark Wielaard <mark@klomp.org>
diff --git a/libebl/ChangeLog b/libebl/ChangeLog
index 3ecd732..de325ab 100644
--- a/libebl/ChangeLog
+++ b/libebl/ChangeLog
@@ -1,3 +1,8 @@
+2018-02-21  Mark Wielaard  <mark@klomp.org>
+
+	* eblcheckreloctargettype.c (ebl_check_reloc_target_type): Accept
+	SHT_NOTE.
+
 2018-02-09  Joshua Watt  <JPEWhacker@gmail.com>
 
 	* eblobjnote.c (ebl_object_note): Use FALLTHROUGH macro instead of