gnu: foomatic-filters: Add missing patches.

This is a followup to commit d02aabaf1b.

* gnu/packages/patches/foomatic-filters-CVE-2015-8327.patch: New file.
* gnu/packages/patches/foomatic-filters-CVE-2015-8560.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add them.

gnu/local.mk

@@ -610,6 +610,8 @@ dist_patch_DATA =						\
   %D%/packages/patches/fltk-shared-lib-defines.patch		\
   %D%/packages/patches/fltk-xfont-on-demand.patch		\
   %D%/packages/patches/fontforge-svg-modtime.patch		\
+  %D%/packages/patches/foomatic-filters-CVE-2015-8327.patch	\
+  %D%/packages/patches/foomatic-filters-CVE-2015-8560.patch	\
   %D%/packages/patches/freeimage-CVE-2015-0852.patch		\
   %D%/packages/patches/freeimage-CVE-2016-5684.patch		\
   %D%/packages/patches/freeimage-fix-build-with-gcc-5.patch	\

gnu/packages/patches/foomatic-filters-CVE-2015-8327.patch

@@ -0,0 +1,14 @@
+Fix for <https://nvd.nist.gov/vuln/detail?vulnId=CVE-2015-8327>.
+
+--- a/util.c	2014-06-20 19:26:18 +0000
++++ b/util.c	2015-10-30 15:45:03 +0000
+@@ -31,7 +31,7 @@
+ #include <assert.h>
+ 
+ 
+-const char* shellescapes = "|<>&!$\'\"#*?()[]{}";
++const char* shellescapes = "|<>&!$\'\"`#*?()[]{}";
+ 
+ const char * temp_dir()
+ {
+

gnu/packages/patches/foomatic-filters-CVE-2015-8560.patch

@@ -0,0 +1,13 @@
+Fix for <https://nvd.nist.gov/vuln/detail?vulnId=CVE-2015-8560>.
+
+--- a/util.c	2015-10-30 15:45:03 +0000
++++ b/util.c	2015-12-12 23:27:21 +0000
+@@ -31,7 +31,7 @@
+ #include <assert.h>
+ 
+ 
+-const char* shellescapes = "|<>&!$\'\"`#*?()[]{}";
++const char* shellescapes = "|;<>&!$\'\"`#*?()[]{}";
+ 
+ const char * temp_dir()
+ {