[PATCH] kcov: add missing #include <linux/sched.h>

[Kefeng Wang]

It is needed by struct task_struct, fixes the following build problem
with old gcc:

../kernel/kcov.c: In function â__sanitizer_cov_trace_pcâ:
../kernel/kcov.c:66: error: dereferencing pointer to incomplete type
	......
../kernel/kcov.c:239: error: dereferencing pointer to incomplete type

Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
---

note:
- Build error occurred when I backported kcov to an old kernel version
  with an old gcc

 kernel/kcov.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/kcov.c b/kernel/kcov.c
index 30e6d05..3cbb0c8 100644
--- a/kernel/kcov.c
+++ b/kernel/kcov.c
@@ -7,6 +7,7 @@
 #include <linux/fs.h>
 #include <linux/mm.h>
 #include <linux/printk.h>
+#include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/vmalloc.h>
-- 
1.7.12.4