CXX-350 Add a C++11 buildvariant
minor: remove illegal characters from buildvariant name
minor: enable leak detection
minor: set path to llvm symbolizer
CXX-352 Add a 32-bit Linux buildvariant
minor: get rid of os_name extension in config file
minor: disable leak checks for now
CXX-349 add option for dynamic libs on non windows
minor: CXX-359 remove inline keyword from BSONElement::toString definition
CXX-339 Backport server r2.7.6..r2.7.7 changes
CXX-346 add getIndexNames helper
minor: CXX-346 fix style in getIndexNames definition
CXX-336 remove connection pool and associated cruft