Revert "x86/build: Move _etext to actual end of .text"

This reverts commit 87386764 which is
commit 392bef709659abea614abfe53cf228e7a59876a4 upstream.

This breaks the android build at the moment as it still uses binutils :(

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>