* config/arc/arc.h
        [DEFAULT_LIBC == LIBC_UCLIBC] (TARGET_OS_CPP_BUILTINS): Define.
Fix TARGET_OS_CPP_BUILTINS to use GNU_USER_TARGET_OS_CPP_BUILTINS instead of
LINUX_TARGET_OS_CPP_BUILTINS to mirror mainline change in April 2011.
Merge branch 'arc-gcc-mainline' of github.com:foss-for-synopsys-dwc-arc-processors/gcc into arc-gcc-mainline

Conflicts:
	gcc/ChangeLog.ARC
        * config/arc/arc.h
        [DEFAULT_LIBC == LIBC_UCLIBC] (TARGET_OS_CPP_BUILTINS): Define.