toolchain/gcc: fix build on MacOS arm64

Added patch for GCC to fix compilation issues on MacOS arm64

The original commit message from Przemysław Buczkowski:

GCC: Patch for Apple Silicon compatibility

This patch fixes a linker error occuring when compiling
the cross-compiler on macOS and ARM64 architecture.

Adapted from:
https://github.com/richfelker/musl-cross-make/issues/116#issuecomment-823612404



Signed-off-by: Sergey V. Lobanov <sergey@lobanov.in>