Change cpp.tmpl files to cc.tmpl

Formats of C++ template files are mixed up with cpp.tmpl and cc.tmpl.
Unify C++ template files to cc.tmpl

Bug: 894684
Change-Id: I4f7413f29809bcd3262a20c7f40a23e63ba45d3a
Reviewed-on: https://chromium-review.googlesource.com/c/1278567
Reviewed-by: Kent Tamura <tkent@chromium.org>
Commit-Queue: Amos Lim <eui-sang.lim@samsung.com>
Cr-Commit-Position: refs/heads/master@{#599129}
116 files changed