Documentation: Update FreeBSD prerequisites

FreeBSD comes with Clang as default host compiler and provides
GCC in the package system. The commit adds a few dependencies to
the pkg command line.

Documentation/BuildInstructionsOther.md

@@ -92,6 +92,6 @@ doas pkg_add bash cmake g++ gcc git gmake gmp ninja ccache rsync coreutils qemu
 ## FreeBSD prerequisites
 
 ```console
-pkg install bash coreutils git gmake ninja sudo gmp mpc mpfr ccache rsync
+pkg install bash cmake coreutils e2fsprogs fusefs-ext2 gcc git gmake ninja sudo gmp mpc mpfr ccache rsync
 ```