clang-format: [JS] fix indenting bound functions.

clang-format: [JS] fix indenting bound functions.

Summary:
The previous fix to force build style wrapping if the previous token is a closing parenthesis broke a peculiar pattern where users parenthesize the function declaration in a bind call:
    fn((function() { ... }).bind(this));

This restores the previous behaviour by reverting that change, but narrowing the special case for unindenting closing parentheses to those followed by semicolons and opening braces, i.e. immediate calls and function declarations.

Reviewers: djasper

Subscribers: cfe-commits, klimek

Differential Revision: https://reviews.llvm.org/D33640

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@304135 91177308-0d34-0410-b5e6-96231b3b80d8