ANDROID: init: ensure initcall ordering with LTO

With LTO, LLVM sorts initcalls in a single translation unit alphabetically
based on the name of the function (or actually, the variable stored in
the initcall section). Use __COUNTER__ in the variable name in an attempt
to preserve the intended order.

In addition, LTO requires all initcall variables to have unique names. Use
__LINE__ in the name to reduce the chance of name collisions.

Bug: 62093296
Bug: 67506682
Bug: 133186739
Change-Id: I4fa3cb93cba967a1440ac53328eb6b8ac649ff36
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>