[pitivi] docs: Simplify instructions for installing the Debug symbols

[Alexandru Băluț <alexbalut src gnome org>]

commit 42ddc3e30ae472bbb02ada2da9d17e25eaf26c27
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Mon Feb 1 18:38:54 2021 +0100

    docs: Simplify instructions for installing the Debug symbols
    
    The instructions were not working anymore with the latest flatpak.

 docs/Bug_reporting.md | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)
---
diff --git a/docs/Bug_reporting.md b/docs/Bug_reporting.md
index 1a058269f..4eb08bf7d 100644
--- a/docs/Bug_reporting.md
+++ b/docs/Bug_reporting.md
@@ -87,8 +87,7 @@ and run `thread apply all bt` to get the backtraces for all the threads.
 
 ### When running in the development environment
 
-1. Make sure you have the GNOME Sdk and Debug symbols installed,
-see below.
+1. Install the GNOME SDK Debug symbols and update them, see below.
 
 2. Enter the sandbox:
 
@@ -104,16 +103,13 @@ gdb python3 -ex "run $PITIVI_REPO_DIR/bin/pitivi"
 
 ### When running with Flatpak
 
-1. Make sure you have the GNOME Sdk and Debug symbols installed:
+1. Install the GNOME SDK and its Debug symbols and update them:
 
 ```
-GNOME_REPO=$(flatpak info org.gnome.Platform//3.38 | grep Origin | awk '{ print $2 }')
-for i in $(flatpak list | grep org.pitivi.Pitivi/ | awk '{ print $1 }'); do
-  flatpak install --user $GNOME_REPO $(flatpak info $i |grep Runtime |awk '{ print $2 }' |sed 
s/Platform/Sdk/)
-  flatpak update --user $(flatpak info $i |grep Runtime |awk '{ print $2 }' |sed s/Platform/Sdk/)
-  flatpak install --user $GNOME_REPO $(flatpak info $i |grep Runtime |awk '{ print $2 }' |sed 
s/Platform/Sdk.Debug/)
-  flatpak update --user $(flatpak info $i |grep Runtime |awk '{ print $2 }' |sed s/Platform/Sdk.Debug/)
-done
+flatpak --user install flathub org.gnome.Sdk/x86_64/3.38
+flatpak --user install flathub org.gnome.Sdk.Debug/x86_64/3.38
+flatpak --user update          org.gnome.Sdk/x86_64/3.38
+flatpak --user update          org.gnome.Sdk.Debug/x86_64/3.38
 ```
 
 2. Start a shell in the Pitivi flatpak sandbox: