cc/gcc: Apply CT_CC_GCC_DISABLE_PCH to do_cc_core.
Otherwise, users have to input --disable-libstdcxx-pch option
when building bare-metal CANADIAN C++ compiler.
Reviewed-by: Michael Hope
Signed-off-by: Zhenqiang Chen <zhenqiang.chen@linaro.org>
(transplanted from e3e1c9d45bddfbfb433ee9d583faf42fa31f50c0)
1 # Bare metal config options
5 ## help 'Bare metal' refers to those programs that run without any kernel.
7 ## help You probably want to say 'y' here if you plan to use your compiler
8 ## help to build bootloaders. It is not yet suitable to build Linux kernels,
9 ## help though, because the APCI stuff relies on the target C library headers
10 ## help being available?!?!...