build/linux: Rename suffix of flatpak scripts to flatpakbuilder

Since the praxis in all other scripts is to
name the suffix with the toolkit name

.gitlab-ci.yml

@@ -395,7 +395,7 @@ deps-flatpak-x64:
     #paths:
       #- .flatpak-builder/
   script:
-    - sh build/linux/flatpak/1_build-deps-flatpak.sh
+    - sh build/linux/flatpak/1_build-deps-flatpakbuilder.sh
   artifacts:
     paths:
       - .flatpak-builder.tar
@@ -411,7 +411,7 @@ gimp-flatpak-x64:
   variables:
     GIT_SUBMODULE_STRATEGY: recursive
   script:
-    - sh build/linux/flatpak/2_build-gimp-flatpak.sh
+    - sh build/linux/flatpak/2_build-gimp-flatpakbuilder.sh
   artifacts:
     paths:
       - repo.tar
@@ -751,7 +751,7 @@ dist-flatpak-weekly:
   needs: ["gimp-flatpak-x64"]
   stage: distribution
   script:
-    - sh build/linux/flatpak/3_dist-gimp-flatpak.sh
+    - sh build/linux/flatpak/3_dist-gimp-flatpakbuilder.sh
   artifacts:
     expose_as: 'Linux flatpak'
     paths:

build/linux/flatpak/1_build-deps-flatpakbuilder.sh

@@ -9,7 +9,7 @@ set -e
 
 if [ -z "$GITLAB_CI" ]; then
   # Make the script work locally
-  if [ "$0" != 'build/linux/flatpak/1_build-deps-flatpak.sh' ] && [ $(basename "$PWD") != 'flatpak' ]; then
+  if [ "$0" != 'build/linux/flatpak/1_build-deps-flatpakbuilder.sh' ] && [ $(basename "$PWD") != 'flatpak' ]; then
     printf '\033[31m(ERROR)\033[0m: Script called from wrong dir. Please, read: https://developer.gimp.org/core/setup/build/linux/\n'
     exit 1
   elif [ $(basename "$PWD") = 'flatpak' ]; then

build/linux/flatpak/2_build-gimp-flatpakbuilder.sh

@@ -9,7 +9,7 @@ set -e
 
 if [ -z "$GITLAB_CI" ]; then
   # Make the script work locally
-  if [ "$0" != 'build/linux/flatpak/2_build-gimp-flatpak.sh' ] && [ $(basename "$PWD") != 'flatpak' ]; then
+  if [ "$0" != 'build/linux/flatpak/2_build-gimp-flatpakbuilder.sh' ] && [ $(basename "$PWD") != 'flatpak' ]; then
     printf '\033[31m(ERROR)\033[0m: Script called from wrong dir. Please, read: https://developer.gimp.org/core/setup/build/linux/\n'
     exit 1
   elif [ $(basename "$PWD") = 'flatpak' ]; then
@@ -21,7 +21,7 @@ fi
 
 
 # Install part of the deps
-eval "$(sed -n '/Install part/,/End of check/p' build/linux/flatpak/1_build-deps-flatpak.sh)"
+eval "$(sed -n '/Install part/,/End of check/p' build/linux/flatpak/1_build-deps-flatpakbuilder.sh)"
 
 if [ "$GITLAB_CI" ]; then
   # Extract deps from previous job