[GCC bug #63539]: libgo does not use the newly built objcopy when doing a combined...

[GCC bug #63539]: libgo does not use the newly built objcopy when doing a combined build

2015-01-03  Andrew Pinski  <apinski@cavium.com>

        * Makefile.def (flags_to_pass): Pass OBJCOPY_FOR_TARGET also.
        * Makefile.tpl (HOST_EXPORTS): Add OBJCOPY_FOR_TARGET.
        (BASE_TARGET_EXPORTS): Add OBJCOPY.
        (OBJCOPY_FOR_TARGET): New variable.
        (EXTRA_TARGET_FLAGS): Add OBJCOPY.
        * Makefile.in: Regenerate.
        * configure.ac: Check for already installed target objcopy.
        Also GCC_TARGET_TOOL on objcopy.
        * configure: Regenerate.