net-im/libquotient: fix USES

(cherry picked from commit 04384b7a5a0ba844eded369f6b03215b100da56f)

Cherry-picked to to fix make index.

• describe.net-im ---

sh: /bin/clang: not found
make[4]: "/usr/ports/Mk/Uses/compiler.mk" line 80: warning: "/bin/clang --version" returned non-zero status
make[4]: "/usr/ports/Mk/Uses/compiler.mk" line 128: warning: "/bin/clang++ -# /dev/null 2>&1" returned non-zero status sh: /bin/clang: not found make[4]: "/usr/ports/Mk/Uses/compiler.mk" line 80: warning: "/bin/clang --version" returned non-zero status make[4]: "/usr/ports/Mk/Uses/compiler.mk" line 128: warning: "/bin/clang++ -# /dev/null 2>&1" returned non-zero status

• describe.net-mgmt ---

PR: 272285
Reported by: yasu@