skip shebang in the first line

Something like this works now:

===
% PATH="./bin:$PATH" ./sum.ktscript 31 21
31 + 21 = 52

% cat sum.ktscript
#!/usr/bin/env kotlin -script

val a = Integer.parseInt(args[0])
val b = Integer.parseInt(args[1])
println("$a + $b = ${a + b}")
===

compiler/testData/psi/script/Shebang.txt

@@ -0,0 +1,14 @@
+JetFile: Shebang.ktscript
+  PsiComment(SHEBANG_COMMENT)('#!/usr/bin/env kotlin')
+  PsiWhiteSpace('\n\n')
+  SCRIPT
+    BLOCK
+      CALL_EXPRESSION
+        REFERENCE_EXPRESSION
+          PsiElement(IDENTIFIER)('println')
+        VALUE_ARGUMENT_LIST
+          PsiElement(LPAR)('(')
+          VALUE_ARGUMENT
+            REFERENCE_EXPRESSION
+              PsiElement(IDENTIFIER)('args')
+          PsiElement(RPAR)(')')