[yabridgectl] Check for libdbus-1.so

Instead of checking for notify-send.

tools/yabridgectl/Cargo.lock

@@ -311,6 +311,16 @@ version = "0.2.126"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "349d5a591cd28b49e1d1037471617a32ddcda5731b99419008085f72d5a53836"
 
+[[package]]
+name = "libloading"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "efbc0f03f9a775e9f6aed295c6a1ba2253c5757a9e03d55c6caa46a681abcddd"
+dependencies = [
+ "cfg-if",
+ "winapi",
+]
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.0.46"
@@ -832,6 +842,7 @@ dependencies = [
  "colored",
  "goblin",
  "is_executable",
+ "libloading",
  "promptly",
  "rayon",
  "reflink",