python: Bump revision for Linuxbrew
python: Bump revision for Linuxbrew

revision 1 already existed for Linuxbrew as of
Linuxbrew/homebrew-core#673, but upstream also bumped the revision since
then (when readline changed its soname).

The 2.7.12_1 bottle therefore already exists.

Bump to revision 2 so we can publish a new Linuxbrew bottle
after building against the new readline.

Closes Linuxbrew/homebrew-core#1008.

Signed-off-by: Bob W. Hogg <c772a964fd55352a3510e5d535dd9ccc9ac30168@linux.com>

Linuxbrew/homebrew-core,Linuxbrew/homebrew-core,maxim-belkin/homebrew-core,LinuxbrewTestBot/homebrew-core,rwhogg/homebrew-core,maxim-belkin/homebrew-core,rwhogg/homebrew-core,LinuxbrewTestBot/homebrew-core