chore: renaming generic_manifest to manifest_all

I did that to avoid get confused when editing the files. Having both
with the same initial name make it simple to identify the one I must
edit.

src/chrome.sh

@@ -1,6 +1,6 @@
 #!/bin/bash --
 
-sed -z 's|<<firefox[^<]*<</firefox>>||g' generic_manifest.json > manifest.json
+sed -z 's|<<firefox[^<]*<</firefox>>||g' manifest_all.json > manifest.json
 sed -i 's|<</chrome>>||g' manifest.json
 sed -i 's|<<chrome>>||g' manifest.json
 

src/ff.sh

@@ -1,6 +1,6 @@
 #!/bin/bash --
 
-sed -z 's|<<chrome[^<]*<</chrome>>||g' generic_manifest.json > manifest.json
+sed -z 's|<<chrome[^<]*<</chrome>>||g' manifest_all.json > manifest.json
 sed -i 's|<</firefox>>||g' manifest.json
 sed -i 's|<<firefox>>||g' manifest.json