Bug#28105016 SERVER 8.0.12 DOXYGEN BUILDS GENERATED WITH EMPTY REVISION

NUMBER

Doxygen cleanup, fixed regression from:

commit a4016740ee3cc6389b8908ce514bc927b6727bee
Author: Marc Alff <[email protected]>
Date:   Wed Jan 3 17:33:39 2018 +0100

    Doxygen build cleanup

    Change doxygen_resources/doxygen-filter-mysqld
    from a bash script to a perl script,
    so it runs also on Windows.

Somehow PUSH_REVISION was renamed to BRANCH_REVISION.
The correct variable, used in PB2, is PUSH_REVISION.

doxygen_resources/doxygen-filter-mysqld

@@ -50,7 +50,7 @@ if (! defined $gen_branch) {
 }
 chomp ($gen_branch);
 
-$gen_revision = $ENV{BRANCH_REVISION};
+$gen_revision = $ENV{PUSH_REVISION};
 if (! defined $gen_revision) {
   $gen_revision = `git log -1 --format=%H`;
 }