Previously, llvm would emit naclcall instead of call to get the effect
of bundle-align-to-end, but now it just emits plain calls and aligns
plain calls like NaCl binutils would do. Adjust a few Subzero tests.
See: https://codereview.chromium.org/647443005/

Currently leaving the nop checks loose in case the integrated assembler
has some intermediate stage where it emits the bytes of a call
in a "raw" manner (without padding).

BUG=none
R=kschimpf@google.com

Review URL: https://codereview.chromium.org/671193003