Update documentation of pstore

After systemd has started to support pstore the documentation needs to be adapted accordingly.

Upon startup, systemd-pstore will monitor and extract the pstore contents and save it inside /var/lib/systemd/pstore/.

This MR is related to tests/apertis-test-cases!603 (merged)

Signed-off-by: Nithin M N MN.Nithin@in.bosch.com

content/guides/pstore.md

@@ -196,13 +196,13 @@ For test purpose, you can generate a kernel crash by setting reboot timeout to
 
 ## Retrieve logs in Linux
 
-After reboot, logs ca be found at /sys/fs/pstore:
+After a crash induced reboot, logs can be found at /var/lib/systemd/pstore:
 
-    $ sudo ls -l /sys/fs/pstore
+    $ sudo ls -l /var/lib/systemd/pstore
     total 0
-    -r--r--r-- 1 root root 8180 2019-11-15 11:58 console-ramoops-0
-    -r--r--r-- 1 root root 8136 2019-11-15 11:51 dmesg-ramoops-0
-    -r--r--r-- 1 root root 7856 2019-11-15 11:51 dmesg-ramoops-1
+    -rw------- 1 root root 4084 Mar  1 08:32 console-ramoops-0
+    -rw------- 1 root root 4023 Mar  1 08:27 dmesg-ramoops-0
+    -rw-r----- 1 root root 4040 Mar  1 08:15 dmesg.txt
 
 ## Retrieve logs in U-Boot
 
@@ -281,3 +281,5 @@ save`, e.g. on root directory of 1st partition of the 2nd MMC:
     update journal finished
     8180 bytes written in 719 ms (10.7 KiB/s)
 
+Once booted, we can access the log file inside the mountpoint of 1st partition of the 2nd MMC.  
+Check the mountpoint using lsblk command and we can view the log files inside that.
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