dev-ada/gprbuild: fix NULL DT_RUNPATH

Closes: https://bugs.gentoo.org/834701
Package-Manager: Portage-3.0.30, Repoman-3.0.3
Signed-off-by: Alfredo Tupone <tupone@gentoo.org>

dev-ada/gprbuild/files/gprbuild-2021-runpath.patch

@@ -0,0 +1,11 @@
+--- a/gpr/src/gpr-util.adb	2022-03-19 22:41:32.372348082 +0100
++++ b/gpr/src/gpr-util.adb	2022-03-19 22:41:54.325010633 +0100
+@@ -3634,7 +3634,7 @@
+             end if;
+          end loop;
+ 
+-         return Ret;
++         return Ret(1 .. Length - Separator'Length);
+       end;
+    end Concat_Paths;
+ 

dev-ada/gprbuild/gprbuild-2021-r3.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2021 Gentoo Authors
+# Copyright 1999-2022 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -33,6 +33,7 @@ PATCHES=(
 	"${FILESDIR}"/${P}-gentoo.patch
 	"${FILESDIR}"/${P}-nm.patch
 	"${FILESDIR}"/${PN}-22.0.0-ar.patch
+	"${FILESDIR}"/${P}-runpath.patch
 )
 
 src_prepare() {

dev-ada/gprbuild/gprbuild-22.0.0-r2.ebuild

@@ -32,6 +32,7 @@ PATCHES=(
 	"${FILESDIR}"/${P}-gentoo.patch
 	"${FILESDIR}"/${P}-nm.patch
 	"${FILESDIR}"/${P}-ar.patch
+	"${FILESDIR}"/${PN}-2021-runpath.patch
 )
 
 src_prepare() {