boot/shim: fix build issue due to gnu-efi

shim fails to build with:

console.c:448:5: error: ‘EFI_WARN_UNKOWN_GLYPH’ undeclared here (not in a function); did you mean ‘EFI_WARN_UNKNOWN_GLYPH’?
  448 |  {  EFI_WARN_UNKOWN_GLYPH,      L"Warning Unknown Glyph"},
      |     ^~~~~~~~~~~~~~~~~~~~~
      |     EFI_WARN_UNKNOWN_GLYPH
make[2]: *** [<builtin>: console.o] Error 1
make[2]: *** Waiting for unfinished jobs....

Backport upstream commit d230d02f990f02293736dca78b108f86c86d1bd0 to
resolve this issue.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

boot/shim/0001-console-Fix-a-typo-in-the-EFI-warning-list-in-gnu-ef.patch

@@ -0,0 +1,57 @@
+From b00d7f63df7ee6f74a63515f1469768e9cb2aa7a Mon Sep 17 00:00:00 2001
+From: Peter Jones <pjones@redhat.com>
+Date: Mon, 26 Aug 2019 16:12:05 -0400
+Subject: [PATCH] console: Fix a typo in the EFI warning list in gnu-efi
+
+Some versions of gnu-efi have a typo, in which "EFI_WARN_UNKNOWN_GLYPH"
+is accidentally "EFI_WARN_UNKOWN_GLYPH".  Work around that, so that we
+can use the not-silly one in console.c's list of error and warning
+messages.
+
+This is a backport from devel for:
+
+  commit 5f62b22ccd636d326b3229a2b196118701c6f3f7
+  Author: Peter Jones <pjones@redhat.com>
+  Date:   Mon Aug 26 16:12:05 2019 -0400
+
+Signed-off-by: Peter Jones <pjones@redhat.com>
+Upstream: d230d02f990f02293736dca78b108f86c86d1bd0
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
+---
+ include/console.h | 6 ++++++
+ lib/console.c     | 2 +-
+ 2 files changed, 7 insertions(+), 1 deletion(-)
+
+diff --git a/include/console.h b/include/console.h
+index deb4fa3..00da98d 100644
+--- a/include/console.h
++++ b/include/console.h
+@@ -7,6 +7,12 @@
+ #define PrintAt(fmt, ...) \
+ 	({"Do not directly call PrintAt() use console_print_at() instead" = 1;});
+ 
++#if !defined(EFI_WARN_UNKNOWN_GLYPH) && defined(EFI_WARN_UNKOWN_GLYPH)
++#define EFI_WARN_UNKNOWN_GLYPH EFI_WARN_UNKOWN_GLYPH
++#elif !defined(EFI_WARN_UNKNOWN_GLYPH)
++#define EFI_WARN_UNKNOWN_GLYPH EFIWARN(1)
++#endif
++
+ EFI_STATUS
+ console_get_keystroke(EFI_INPUT_KEY *key);
+ UINTN
+diff --git a/lib/console.c b/lib/console.c
+index 3aee41c..ccd4d4d 100644
+--- a/lib/console.c
++++ b/lib/console.c
+@@ -445,7 +445,7 @@ static struct {
+ 	{  EFI_SECURITY_VIOLATION,     L"Security Violation"},
+ 
+ 	// warnings
+-	{  EFI_WARN_UNKOWN_GLYPH,      L"Warning Unknown Glyph"},
++	{  EFI_WARN_UNKNOWN_GLYPH,     L"Warning Unknown Glyph"},
+ 	{  EFI_WARN_DELETE_FAILURE,    L"Warning Delete Failure"},
+ 	{  EFI_WARN_WRITE_FAILURE,     L"Warning Write Failure"},
+ 	{  EFI_WARN_BUFFER_TOO_SMALL,  L"Warning Buffer Too Small"},
+-- 
+2.30.2
+