gnu: zsh: Patch failing test that uses egrep.

* gnu/packages/patches/zsh-egrep-failing-test.patch: New file.
* gnu/packages/shells.scm (zsh): Patch it.
* gnu/local.mk (dist_patch_DATA): Register it.

Signed-off-by: Guillaume Le Vaillant <glv@posteo.net>

gnu/local.mk

@@ -2040,7 +2040,8 @@ dist_patch_DATA =						\
   %D%/packages/patches/xterm-370-explicit-xcursor.patch		\
   %D%/packages/patches/xygrib-fix-finding-data.patch		\
   %D%/packages/patches/yggdrasil-extra-config.patch	\
-  %D%/packages/patches/zig-use-system-paths.patch
+  %D%/packages/patches/zig-use-system-paths.patch		\
+  %D%/packages/patches/zsh-egrep-failing-test.patch
 
 MISC_DISTRO_FILES =				\
   %D%/packages/ld-wrapper.in

gnu/packages/patches/zsh-egrep-failing-test.patch

@@ -0,0 +1,11 @@
+--- a/Test/E01options.ztst	2023-03-30 21:34:12.372309112 +0200
++++ b/Test/E01options.ztst	2023-03-30 21:34:33.212335339 +0200
+@@ -649,7 +649,7 @@
+ >noktarg1
+ >0 1
+ 
+-  showopt() { setopt | egrep 'localoptions|ksharrays'; }
++  showopt() { setopt | grep -E 'localoptions|ksharrays'; }
+   f1() { setopt localoptions ksharrays; showopt }
+   f2() { setopt ksharrays; showopt }
+   setopt kshoptionprint

gnu/packages/shells.scm

@@ -467,7 +467,8 @@ history mechanism, job control and a C-like syntax.")
                            ".tar.xz")))
               (sha256
                (base32
-                "06crvpqbpm8sq5c215f4b985z7npwnqnj0i0g53hnq6fp8h3b5xn"))))
+                "06crvpqbpm8sq5c215f4b985z7npwnqnj0i0g53hnq6fp8h3b5xn"))
+              (patches (search-patches "zsh-egrep-failing-test.patch"))))
     (build-system gnu-build-system)
     (arguments `(#:configure-flags
                  `("--with-tcsetpgrp"