gnu: ghostscript: Switch to Artifex Ghostcript and update to 9.21.

* gnu/packages/ghostscript.scm (ghostscript): Update to 9.21.
[source]: Fetch the source from Artifex.
[native-inputs]: Remove pkg-config.
[inputs]: Add jbig2dec and use libjpeg instead of libjpeg-8.
[arguments]: Add #:configure-flags.
[replacement]: Remove field.
(ghostcript/fixed): Remove variable.
* gnu/packages/patches/ghostscript-CVE-2017-8291.patch,
gnu/packages/patches/ghostscript-runpath.patch: Adjust to new upstream
source.
* gnu/packages/patches/ghostscript-CVE-2013-5653.patch,
gnu/packages/patches/ghostscript-CVE-2015-3228.patch,
gnu/packages/patches/ghostscript-CVE-2016-7976.patch,
gnu/packages/patches/ghostscript-CVE-2016-7978.patch,
gnu/packages/patches/ghostscript-CVE-2016-7979.patch,
gnu/packages/patches/ghostscript-CVE-2016-8602.patch: Delete files.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.

1 files changed, 0 insertions, 48 deletions

diff --git a/gnu/packages/patches/ghostscript-CVE-2016-7979.patch b/gnu/packages/patches/ghostscript-CVE-2016-7979.patch
deleted file mode 100644
index a557adfdea..0000000000
--- a/gnu/packages/patches/ghostscript-CVE-2016-7979.patch
+++ /dev/null
@@ -1,48 +0,0 @@
-The following patch was adapted for GNU Ghostscript
-by Mark H Weaver <[email protected]> based on:
-
-http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=875a0095f37626a721c7ff57d606a0f95af03913
-
-From 875a0095f37626a721c7ff57d606a0f95af03913 Mon Sep 17 00:00:00 2001
-From: Ken Sharp <[email protected]>
-Date: Wed, 5 Oct 2016 10:10:58 +0100
-Subject: [PATCH] DSC parser - validate parameters
-
-Bug #697190 ".initialize_dsc_parser doesn't validate the parameter is a dict type before using it."
-
-Regardless of any security implications, its simply wrong for a PostScript
-operator not to validate its parameter(s).
-
-No differences expected.
----
- psi/zdscpars.c | 13 +++++++++----
- 1 file changed, 9 insertions(+), 4 deletions(-)
-
-diff --git a/psi/zdscpars.c b/psi/zdscpars.c
-index c05e154..9b4b605 100644
---- a/psi/zdscpars.c
-+++ b/psi/zdscpars.c
-@@ -150,11 +150,16 @@ zinitialize_dsc_parser(i_ctx_t *i_ctx_p)
-     ref local_ref;
-     int code;
-     os_ptr const op = osp;
--    dict * const pdict = op->value.pdict;
--    gs_memory_t * const mem = (gs_memory_t *)dict_memory(pdict);
--    dsc_data_t * const data =
--        gs_alloc_struct(mem, dsc_data_t, &st_dsc_data_t, "DSC parser init");
-+    dict *pdict;
-+    gs_memory_t *mem;
-+    dsc_data_t *data;
- 
-+    check_read_type(*op, t_dictionary);
-+
-+    pdict = op->value.pdict;
-+    mem = (gs_memory_t *)dict_memory(pdict);
-+
-+    data = gs_alloc_struct(mem, dsc_data_t, &st_dsc_data_t, "DSC parser init");
-     if (!data)
-         return_error(e_VMerror);
-     data->document_level = 0;
--- 
-2.9.1
-