gcc/ld errors when compiling with EESSI modules

I was trying to compile some C code, and ran into the following issues:
```
$ gcc hello.c -o hello
/usr/bin/ld.gold: --push-state: unknown option
/usr/bin/ld.gold: use the --help option for usage information
collect2: error: ld returned 1 exit status

$ which -a ld.gold
/usr/bin/ld.gold
/bin/ld.gold
```
We somehow need to instruct gcc to use the one from the compatibility layer.