[sanitizer] Intercept iconv.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@195917 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] Intercept times.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@195918 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] Disable iconv interceptor in OSX.

iconv is defined in an optional DSO, and our interception logic on OSX does not
support that.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@195919 91177308-0d34-0410-b5e6-96231b3b80d8