Without this, g++/c++ compilation doesn't work on target due to missing
header files. Automated sanity tests fail. Add back the gcc4 patch to
address this.
(From OE-Core rev: 93d8becf19cc72df650d3aaff7e3ea188bd6e09e)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>