[PING] [MSP430] Trunk patches required for gcc-6-branch to build for msp430

[Jozef Lawrynowicz]

Ping, original post: 
https://gcc.gnu.org/ml/gcc-patches/2017-03/msg01560.html
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For the msp430-elf target, the gcc-6-branch fails to build when 
configured to enable C++ support.

The gcc-5-branch successfully builds with C++ support.

Backporting r244727 and r243310 to the gcc-6-branch fixes the two
build issues, so the build completes successfully.

I don't have write access to the GCC repository, so would appreciate
if someone could backport these patches to gcc-6-branch if that is 
acceptable.