Replace env!("...") expressions

* Use new regen_bp.sh to find/fix env!("...") expressions
* No need of local diff file or post_update.sh because
  regen_bp.sh will fix any old/new env!("...") expressions.

Bug: 172299943
Test: build all rust crates
Change-Id: I3d85ce0b883c876d36277cd6cee79e5aed61fd22
1 file changed