media-gfx/bambustudio-bin: add 02.06.00.51-r2, drop 02.06.00.51-r1

- Drop meaningless := subslot operators (no effect on binary
  packages) and pin the slot the AppImage was built against.

Signed-off-by: Huang Rui <vowstar@gmail.com>

media-gfx/bambustudio-bin/bambustudio-bin-02.06.00.51-r2.ebuild

@@ -26,7 +26,7 @@ RDEPEND="
 	dev-libs/wayland
 	media-gfx/openvdb
 	media-libs/fontconfig
-	media-libs/glew:0=
+	media-libs/glew:0
 	>=media-libs/glm-0.9.9.1
 	media-libs/gst-plugins-base
 	media-libs/gstreamer
@@ -34,18 +34,18 @@ RDEPEND="
 	media-libs/mesa
 	net-libs/libsoup:2.4
 	net-libs/webkit-gtk:4.1
-	>=sci-libs/opencascade-7.3.0:0=
+	>=sci-libs/opencascade-7.3.0:0
 	sys-apps/dbus
 	virtual/glu
 	virtual/zlib
-	>=x11-libs/cairo-1.8.8:=
+	>=x11-libs/cairo-1.8.8:0
 	x11-libs/gdk-pixbuf:2
 	x11-libs/gtk+:3
 	x11-libs/libX11
 	x11-libs/libxkbcommon
 	x11-libs/pango
 	>=x11-libs/pixman-0.30
-	x11-libs/wxGTK:${WX_GTK_VER}=[X,opengl]
+	x11-libs/wxGTK:${WX_GTK_VER}[X,opengl]
 "
 DEPEND="${RDEPEND}"
 BDEPEND="