As reported in #520, C++Builder standard libraries don't have a `log()` function at global namespace. Change the invocations to unqualified name lookup, and apply a using-declaration to `std::log()` when compiling under C++Builder.
This is the first of possibly two or three for Borland compilers. We have to be careful because its very easy to break something due to math overloads with other compilers like SunCC or XL/C
trap.h and CRYPTOPP_ASSERT has existed for over a year in Master. We deferred on the cut-over waiting for a minor version bump (5.7). We have to use it now due to CVE-2016-7420
Bug information: https://connect.microsoft.com/VisualStudio/feedback/details/1600701/type-info-does-not-compile-with-has-exceptions-0
For example:
```
C:\Work\github\cryptopp>cl /c /Tp cryptlib.h /Focryptlib.h.obj /D_HAS_EXCEPTIONS=0
Microsoft (R) C/C++ Optimizing Compiler Version 18.00.31101 for x86
Copyright (C) Microsoft Corporation. All rights reserved.
sha.h
c:\work\github\cryptopp\cryptlib.h(292) : error C2039: 'type_info' : is not a member of 'std'
c:\work\github\cryptopp\cryptlib.h(298) : error C2039: 'type_info' : is not a member of 'std'
c:\work\github\cryptopp\cryptlib.h(302) : error C2039: 'type_info' : is not a member of 'std'
c:\work\github\cryptopp\cryptlib.h(305) : error C2039: 'type_info' : is not a member of 'std'
c:\work\github\cryptopp\cryptlib.h(306) : error C2039: 'type_info' : is not a member of 'std'
c:\work\github\cryptopp\cryptlib.h(392) : error C2039: 'type_info' : is not a member of 'std'
c:\work\github\cryptopp\cryptlib.h(437) : error C2039: 'type_info' : is not a member of 'std'
```
Tanzinul Islam
Jeffrey Walton
a.navrotskiy
weidai