kernel: bump 4.19 to 4.19.52

Refreshed all patches.

Fixes:

- CVE-2019-11479
- CVE-2019-11478
- CVE-2019-11477

Also fix a malformed patch issue caught during refresh.

It was caused by removing a whitespace without altering
the index values in a patch which alters a patch.

Compile-tested on: cns3xxx
Runtime-tested on: cns3xxx

Fixes: cf65262492 ("kernel: bump 4.19 to 4.19.51")
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>

target/linux/generic/backport-4.19/370-netfilter-nf_flow_table-fix-offloaded-connection-tim.patch

@@ -82,6 +82,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
 @@ -203,6 +221,7 @@ int flow_offload_add(struct nf_flowtable
  		return err;
  	}
+ 
 +	nf_ct_offload_timeout(flow);
  	flow->timeout = (u32)jiffies;
  	return 0;

target/linux/generic/hack-4.19/902-debloat_proc.patch

@@ -382,7 +382,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  
 --- a/net/ipv4/proc.c
 +++ b/net/ipv4/proc.c
-@@ -523,5 +523,8 @@ static __net_initdata struct pernet_oper
+@@ -524,5 +524,8 @@ static __net_initdata struct pernet_oper
  
  int __init ip_misc_proc_init(void)
  {