.gitignore: Ignore Rust 'target' directories

Although the Cmake rules to build Rust applications keeps the target
directory inside of the build directory, some IDE tools may generate a
target directory while editing the code.  Ignore these so they never get
checked in.

Signed-off-by: David Brown <[email protected]>

Author: d3zd3z

.gitignore

@@ -67,6 +67,10 @@ Cargo.lock
 # file.  Don't save these.
 .cargo/
 
+# Normal west builds will place the Rust target directory under the build directory.  However,
+# sometimes IDEs and such will litter these target directories as well.
+target/
+
 # CI output
 compliance.xml
 _error.types