gnu: ccache: Update to 4.4.1.

* gnu/packages/ccache.scm (ccache): Update to 4.4.1.
[source]: Add patch.
[arguments]: Remove explicit #t return values from phases.
* gnu/packages/patches/ccache-fix-basedir-test.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

gnu/packages/patches/ccache-fix-basedir-test.patch

@@ -0,0 +1,26 @@
+From ad18f15287b83cee5a45b63e02b31c6a601a134f Mon Sep 17 00:00:00 2001
+From: Tobias Geerinckx-Rice <me@tobias.gr>
+Date: Mon, 27 Sep 2021 19:36:30 +0200
+Subject: [PATCH] gnu: ccache: Fix basedir test.
+
+Applied upstream.
+---
+ test/suites/basedir.bash | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/test/suites/basedir.bash b/test/suites/basedir.bash
+index 479c632..34e5cb7 100644
+--- a/test/suites/basedir.bash
++++ b/test/suites/basedir.bash
+@@ -269,7 +269,7 @@ EOF
+ EOF
+     backdate test.h
+ 
+-    pwd="$(/bin/pwd -P)"
++    pwd="$(pwd -P)"
+     $REAL_COMPILER -c $pwd/test.c 2>reference.stderr
+ 
+     CCACHE_ABSSTDERR=1 CCACHE_BASEDIR="$pwd" $CCACHE_COMPILE -c $pwd/test.c 2>ccache.stderr
+-- 
+2.33.0
+