playground/pgbundle: Allow index and build ignore comments anywhere.

Changed pgbundle to find the '+build ignore' and 'pg-index=<num>'
line appearing anywhere in the file, instead of expecting them at
the top. Only the first appearance of each line is considered.

Change-Id: If027e34519cd0f26370a27239d569b83bc1c309d
6 files changed
tree: 1451a643c90e6abbb713d88fe7dbcc36c3b6530a
  1. client/
  2. go/
  3. pgbundle/
  4. .gitignore