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 source "config/configure.in"
2 source "config/backend.in"
3 source "config/global.in"
4 source "config/target.in"
5 source "config/toolchain.in"
6 source "config/kernel.in"
7 source "config/binutils.in"
9 source "config/libc.in"
10 source "config/debug.in"
11 source "config/companion_libs.in"
12 source "config/companion_tools.in"
13 source "config/test_suite.in"