[piexwasm] Makefile: touching the IIFE files should cause a re-build

And did not: fix spelling mistake, iief->iife. Ensure tabs while here.

Test: make clean && make ; touch iief.* && make
No-try: true
Bug: 935285
Change-Id: Icf4c8fdfec41f0b94c6f6e4b4197d60e5a1dd188
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1617047
Reviewed-by: Noel Gordon <noel@chromium.org>
Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#660770}
1 file changed