[analyzer] IdenticalExpr: use getBytes rather than getString to compare string literals.

PR20693. Patch by Anders Rönnholm.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216075 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] IdenticalExpr: don't try to compare integer literals with different widths.

PR20659. Patch by Anders Rönnholm.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216076 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] UnixAPI: Check when open(2) is called with more than three arguments.

Patch by Daniel Fahlgren.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216078 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] UnixAPI: Check that the third argument to open(2) (if present) is an integer.

Patch by Daniel Fahlgren.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216079 91177308-0d34-0410-b5e6-96231b3b80d8
Coverage mapping: fix mapping for objective-c message expression

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216081 91177308-0d34-0410-b5e6-96231b3b80d8
Coverage mapping: fix mapping for objective-c for statement

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216082 91177308-0d34-0410-b5e6-96231b3b80d8
Test: CoverageMapping: use "RUN: FileCheck" command instead of "RUN: cat | Filecheck".

Change the lit RUN commands for 3 tests to use the following pattern
"FileCheck -input-file ..." instead of "cat ... | FileCheck ..." as
suggested by Justin Bogner.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216085 91177308-0d34-0410-b5e6-96231b3b80d8