123595: Logging of make_installer.pl now supports indentation.
#i123773# fix ambiguity between string concatenation and C++ user-defined literals

C++11 conformant compilers such as clang rejects string concatenations
that are ambigous with the C++11 feature "user-defined literals" (N2378)
#i123774# the DBG_ERROR/DBG_WARN/DBG_TRACE macros should always show file and line infO
#i123068# allow OString argument for tools' DbgOut() function

The DbgOut() function is active especially in dbgutil-enabled builds.
For creating dynamic strings the rtl::OString is often used. Providing a
DbgOut() function which allows a direct OString argument helps for
situations where dynamic string creation and DbgOut() are employed.
123729: More cleanup in make_installer.pl