libjsonpb: format files

Format *.cpp according to the new .clang-format-2. The following command
was used to generate this change:

  $ find . \( -name \*.cpp -o -name \*.h \) -exec clang-format \
    --style=file -i {} \;

Test: mm
Bug: 171699326
Change-Id: I7f1199fd8a3431500484f7373ccb5f1583a00956
8 files changed