ktlint_fix: /bin/bash -> /usr/bin/env bash (#1371)

* ktlint_fix: /bin/bash -> /usr/bin/env bash

/usr/bin/env is more portable, can take binary from PATH

Upstream https://github.com/bazelbuild/rules_java/blob/master/java/bazel/rules/java_stub_template.txt has adopted it too

* Update kotlin/internal/lint/ktlint_fix.bzl

Co-authored-by: Dmitry Ivankov <[email protected]>

---------

Co-authored-by: Ben Lee <[email protected]>

Author: dmivankov

kotlin/internal/lint/ktlint_fix.bzl

@@ -14,8 +14,8 @@ def _ktlint_fix_impl(ctx):
     args.append("--relative")
 
     # Much of the following is lifted from:
-    # https://cs.opensource.google/bazel/bazel/+/refs/tags/4.0.0:src/main/java/com/google/devtools/build/lib/bazel/rules/java/java_stub_template.txt;l=114
-    content = """#!/bin/bash
+    # https://github.com/bazelbuild/rules_java/blob/master/java/bazel/rules/java_stub_template.txt
+    content = """#!/usr/bin/env bash
 # Find our runfiles tree.
 #
 # Call this program X.  X was generated by a rule.