Backport and squash the following commits from master:
853e9d1c3 libextractor: Update to 1.7
1a23de5db libextractor: update to version 1.8
a50f26941 libextractor: fix PKG_HASH
6709d9b82 libextractor: update to version 1.9
fix Makefile chmod (644)
replace MD5SUM with HASH
add PKG_MIRROR_HASH when PKG_SOURCE_PROTO:=git
(PKG_SOURCE_PROTO:=svn tarballs are not reproducible for now)
Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>
Cherry-picked r34095 'Add giflib-5.1.0 compatibility' into patches to
fix build against recent versions of giflib.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>