ENV: request no byte code Python when bottling.

Library/Homebrew/extend/ENV/std.rb

@@ -53,6 +53,8 @@ module Stdenv
       self['CMAKE_FRAMEWORK_PATH'] = HOMEBREW_PREFIX/"Frameworks"
     end
 
+    self['PYTHONDONTWRITEBYTECODE'] = "1" if ARGV.build_bottle?
+
     # Os is the default Apple uses for all its stuff so let's trust them
     set_cflags "-Os #{SAFE_CFLAGS_FLAGS}"
 

Library/Homebrew/extend/ENV/super.rb

@@ -84,6 +84,7 @@ module Superenv
     self['CMAKE_LIBRARY_PATH'] = determine_cmake_library_path
     self['ACLOCAL_PATH'] = determine_aclocal_path
     self['M4'] = MacOS.locate("m4") if deps.include? "autoconf"
+    self['PYTHONDONTWRITEBYTECODE'] = "1" if ARGV.build_bottle?
 
     # The HOMEBREW_CCCFG ENV variable is used by the ENV/cc tool to control
     # compiler flag stripping. It consists of a string of characters which act