libdwfl: Use elf_compress[_gnu] to decompress string, symbol and reloc data.

This makes usage of the libdwfl symbol functions work out of the box even
when some sections (string, symbol or xndx) are compressed. For ET_REL
files this makes relocations just work by making sure the target section
is decompressed first before relocations are applied.

Signed-off-by: Mark Wielaard <mjw@redhat.com>
diff --git a/libebl/ChangeLog b/libebl/ChangeLog
index a1a1022..312cf90 100644
--- a/libebl/ChangeLog
+++ b/libebl/ChangeLog
@@ -1,3 +1,7 @@
+2015-12-18  Mark Wielaard  <mjw@redhat.com>
+
+	* eblopenbackend.c (default_debugscn_p): Also match .zdebug sections.
+
 2015-12-08  Jose E. Marchesi  <jose.marchesi@oracle.com>
 
 	* libebl.h: Prototype for ebl_ra_offset.