Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/tools/perf/util/python-ext-sources b/tools/perf/util/python-ext-sources
index 7aa0ea6..9af1838 100644
--- a/tools/perf/util/python-ext-sources
+++ b/tools/perf/util/python-ext-sources
@@ -6,9 +6,11 @@
 #
 
 util/python.c
-util/ctype.c
+../lib/ctype.c
+util/cap.c
 util/evlist.c
 util/evsel.c
+util/perf_event_attr_fprintf.c
 util/cpumap.c
 util/memswap.c
 util/mmap.c
@@ -16,10 +18,10 @@
 ../lib/bitmap.c
 ../lib/find_bit.c
 ../lib/hweight.c
+../lib/string.c
 ../lib/vsprintf.c
 util/thread_map.c
 util/util.c
-util/xyarray.c
 util/cgroup.c
 util/parse-branch-options.c
 util/rblist.c