Merge in viewer-release and version update to 3.7.6

.hgtags

autobuild.xml

indra/cmake/GoogleBreakpad.cmake

indra/linux_crash_logger/linux_crash_logger.cpp

indra/linux_crash_logger/llcrashloggerlinux.cpp

indra/llcommon/llapp.cpp

indra/llcommon/llapp.h

indra/llcommon/llerrorthread.cpp

indra/llcommon/llfile.cpp

indra/llcommon/llfile.h

indra/llcommon/llstring.h

indra/llcommon/stringize.h

indra/llcommon/tests/stringize_test.cpp

indra/llcrashlogger/CMakeLists.txt

indra/llcrashlogger/llcrashlock.cpp

indra/llcrashlogger/llcrashlock.h

indra/llcrashlogger/llcrashlogger.cpp

indra/llcrashlogger/llcrashlogger.h

indra/llvfs/lldir.cpp

indra/llvfs/lldir.h