include rust in docs and systest

DEVEL

@@ -72,6 +72,8 @@ The target platform is indicated by its backend index, as given in table 1.
  +----------------------+------------------+
  | lang_c               | 2                |
  +----------------------+------------------+
+ | lang_rust            | 3                |
+ +----------------------+------------------+
  | lang_go              | 4                |
  +----------------------+------------------+
  | lang_ruby            | 6                |

README.md

@@ -8,7 +8,7 @@ Awib is a brainfuck compiler entirely written in brainfuck.
   as brainfuck, Tcl, C and bash
 - Awib has 6 separate backends and is capable of
   compiling brainfuck source code to Linux executables (i386) and
-  five programming languages: C, Tcl, Go, Ruby and Java
+  five programming languages: C, Tcl, Go, Ruby, Java and Rust
 
 Usage
 -----
@@ -30,6 +30,8 @@ Awib will then produce output accordingly.
     lang_go   - Go code
     lang_tcl  - Tcl code
     lang_java - Java code
+    lang_rust - Rust code
+
 For instance, the following input would produce an executable hello
 world-program for Linux:
 

systest/run.sh

@@ -2,7 +2,7 @@
 
 set -e
 
-ALL_TARGETS="lang_c 386_linux lang_ruby lang_go lang_tcl lang_java"
+ALL_TARGETS="lang_c 386_linux lang_ruby lang_go lang_tcl lang_java lang_rust"
 ALL_TEST_CASES=$(ls -1Sr *.b | cut -f1 -d.|xargs)
 AWIB_BUILD="../awib.b"
 ALL_METHODS="bfint gcc tclsh bash"
@@ -173,6 +173,11 @@ java Bf
 EOF
 	    chmod +x $out
 	    ;;
+
+        lang_rust)
+            mv $out $out.rs
+            rustc $out.rs -o $out
+            ;;
     esac
 
     return 0