net-voip/mumble: depend on libfmt (!)

$ pkg-config --libs spdlog
-lspdlog -pthread -lfmt

$ lddtree /usr/bin/mumble
mumble => /usr/bin/mumble (interpreter => /lib64/ld-linux-x86-64.so.2)
    libspdlog.so.1.15 => /usr/lib64/libspdlog.so.1.15
        libfmt.so.12 => /usr/lib64/libfmt.so.12
        ld-linux-x86-64.so.2 => /lib64/ld-linux-x86-64.so.2
    libfmt.so.11 => /usr/lib64/libfmt.so.11
    libprotobuf.so.31.1.0 => /usr/lib64/libprotobuf.so.31.1.0
[...]

We have to depend on libfmt:= because we link against it even though
we don't directly use it (because of spdlog headers).

Bug: https://bugs.gentoo.org/970739
Signed-off-by: Sam James <sam@gentoo.org>

net-voip/mumble/mumble-1.6.0_pre20250920-r3.ebuild

@@ -48,6 +48,7 @@ RDEPEND="
 	>=dev-libs/openssl-1.0.0b:0=
 	dev-libs/poco:=[util,xml,zip]
 	>=dev-libs/protobuf-2.2.0:=
+	dev-libs/libfmt:=
 	dev-libs/spdlog:=
 	dev-qt/qtbase:6[dbus,gui,network,sqlite,widgets,xml]
 	dev-qt/qtsvg:6

net-voip/mumble/mumble-1.6.0_pre20260215-r2.ebuild

@@ -47,6 +47,7 @@ RDEPEND="
 	>=dev-libs/openssl-1.0.0b:0=
 	dev-libs/poco:=[util,xml,zip]
 	>=dev-libs/protobuf-2.2.0:=
+	dev-libs/libfmt:=
 	dev-libs/spdlog:=
 	dev-qt/qtbase:6[dbus,gui,network,sql,sqlite,ssl,widgets,xml]
 	dev-qt/qtsvg:6

net-voip/mumble/mumble-9999.ebuild

@@ -48,6 +48,7 @@ RDEPEND="
 	>=dev-libs/openssl-1.0.0b:0=
 	dev-libs/poco:=[util,xml,zip]
 	>=dev-libs/protobuf-2.2.0:=
+	dev-libs/libfmt:=
 	dev-libs/spdlog:=
 	dev-qt/qtbase:6[dbus,gui,network,sql,sqlite,ssl,widgets,xml]
 	dev-qt/qtsvg:6