utils: Disable old style definition warnings for libdb.

Newer versions of gcc now warn about old style definitions, such
as those in libdb, which causes compilation failure with DEVMODE
enabled. Ignore these warnings for libdb.

Resolves: #1085

utils/Makefile

@@ -182,7 +182,7 @@ streamplayer: streamplayer.o
 
 CHECK_SUBDIR:	# do nothing, just make sure that we recurse in the subdir/
 db1-ast/libdb1.a: CHECK_SUBDIR
-	_ASTCFLAGS="$(_ASTCFLAGS) -Wno-strict-aliasing" ASTCFLAGS="$(ASTCFLAGS)" $(MAKE) -C db1-ast libdb1.a
+	_ASTCFLAGS="$(_ASTCFLAGS) -Wno-strict-aliasing -Wno-old-style-definition" ASTCFLAGS="$(ASTCFLAGS)" $(MAKE) -C db1-ast libdb1.a
 
 astdb2sqlite3: LIBS+=$(SQLITE3_LIB)
 astdb2sqlite3: _ASTCFLAGS+=$(SQLITE3_INCLUDE)