Add a bundler module for parsing exported symbols

We can use this to detect which plugin formats are supported by a
plugin. Otherwise the bundler would be very awkward to use when
supporting multiple formats.

Cargo.lock

@@ -400,6 +400,17 @@ dependencies = [
  "xml-rs",
 ]
 
+[[package]]
+name = "goblin"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c955ab4e0ad8c843ea653a3d143048b87490d9be56bd7132a435c2407846ac8f"
+dependencies = [
+ "log",
+ "plain",
+ "scroll",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.1"
@@ -665,6 +676,12 @@ version = "0.3.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "58893f751c9b0412871a09abd62ecd2a00298c6c83befa223ef98c52aef40cbe"
 
+[[package]]
+name = "plain"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b4596b6d070b27117e987119b4dac604f3c58cfb0b191112e24771b2faeac1a6"
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.36"
@@ -728,6 +745,26 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 
+[[package]]
+name = "scroll"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "04c565b551bafbef4157586fa379538366e4385d42082f255bfd96e4fe8519da"
+dependencies = [
+ "scroll_derive",
+]
+
+[[package]]
+name = "scroll_derive"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bdbda6ac5cd1321e724fa9cee216f3a61885889b896f073b8f82322789c5250e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "serde"
 version = "1.0.136"
@@ -1118,6 +1155,7 @@ name = "xtask"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "goblin",
  "serde",
  "toml",
 ]