Add Cargo.lock (fkie-cad#233)

Author: ilkecan

.gitignore

@@ -233,10 +233,6 @@ test/artificial_samples/dockcross*
 # will have compiled files and executables
 /target/
 
-# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
-# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
-Cargo.lock
-
 # These are backup files generated by rustfmt
 **/*.rs.bk
 
@@ -265,4 +261,4 @@ ghidra/p_code_extractor/lib/
 *.rar
 
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
-hs_err_pid*
+hs_err_pid*