jhead: bump to version 3.00

Also add hash file.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/jhead/jhead.hash

@@ -0,0 +1,2 @@
+# Locally calculated from download (no sig, hash)
+sha256	88cc01da018e242fe2e05db73f91b6288106858dd70f27506c4989a575d2895e	jhead-3.00.tar.gz

package/jhead/jhead.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-JHEAD_VERSION = 2.97
+JHEAD_VERSION = 3.00
 JHEAD_SITE = http://www.sentex.net/~mwandel/jhead
 JHEAD_LICENSE = Public Domain
 JHEAD_LICENSE_FILES = readme.txt