dev-util/hip: do not include stdlibc++ file in HIPRTC header

When any hip header included with -D__HIPCC_RTC__, it means that
compiler was launched with -E -P to produce a preprocessed header.
In this case not a single libstdc++ header can be used, otherwise it
causes function redefinition on next attempt to include the same header
elsewhere.

Closes: https://bugs.gentoo.org/966188
Signed-off-by: Sv. Lockal <lockalsash@gmail.com>
Part-of: https://github.com/gentoo/gentoo/pull/44725
Signed-off-by: Sam James <sam@gentoo.org>

dev-util/hip/files/hip-6.4.1-no-glibcxx-assert.patch

@@ -13,7 +13,7 @@ Bug: https://bugs.gentoo.org/955623
  #define __HIP_HAS_GET_PCH ${_pchStatus}\n
 +
 +// Workaround for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115740
-+#if defined(__has_include) && defined(__cplusplus) && defined(__HIP__)
++#if defined(__has_include) && defined(__cplusplus) && defined(__HIP__) && !defined(__HIPCC_RTC__)
 +  #if __has_include(\"bits/c++config.h\")
 +    #include <bits/c++config.h>
 +    #undef __glibcxx_assert