board/kontron/pitx-imx8m: add U-Boot 2022.04 patch

The patch is required to fix an issue in U-Boot for linking
the mkeficapsule tool against -luuid and -lgnutls.

Fixes: https://gitlab.com/buildroot.org/buildroot/-/jobs/2720001065

Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

board/kontron/pitx-imx8m/patches/uboot/2022.04/0001-tools-mkeficapsule-use-pkg-config-to-get-luuid-and-l.patch

@@ -0,0 +1,33 @@
+From f3523977e8f5f6b2173708777001332431ebc609 Mon Sep 17 00:00:00 2001
+From: Heiko Thiery <heiko.thiery@gmail.com>
+Date: Tue, 19 Jul 2022 16:17:09 +0200
+Subject: [PATCH 1/2] tools: mkeficapsule: use pkg-config to get -luuid and -lgnutls
+
+Instead of hardcoding -luuid -lgnutls as the flags needed to build
+mkeficapsule, use pkg-config when available.
+
+We gracefully fallback on the previous behavior of hardcoding -luuid
+-lgnutls if pkg-config is not available or fails with an error.
+
+Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
+---
+ tools/Makefile | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/tools/Makefile b/tools/Makefile
+index 9f2339666a..9f6b282ad8 100644
+--- a/tools/Makefile
++++ b/tools/Makefile
+@@ -242,7 +242,8 @@ hostprogs-$(CONFIG_MIPS) += mips-relocs
+ hostprogs-$(CONFIG_ASN1_COMPILER)	+= asn1_compiler
+ HOSTCFLAGS_asn1_compiler.o = -idirafter $(srctree)/include
+ 
+-HOSTLDLIBS_mkeficapsule += -lgnutls -luuid
++HOSTLDLIBS_mkeficapsule += \
++	$(shell pkg-config --libs gnutls uuid 2> /dev/null || echo "-lgnutls -luuid")
+ hostprogs-$(CONFIG_TOOLS_MKEFICAPSULE) += mkeficapsule
+ 
+ # We build some files with extra pedantic flags to try to minimize things
+-- 
+2.30.2
+