Change all hashbangs to /usr/bin/env (#9057)

Summary:
```
git grep -l '#!' | xargs sed -i 's|#!.*/bin/\([^ ]*\)$|#!/usr/bin/env \1|'
```
and some manual tweaking

Test Plan: harbormaster

Reviewers: austin

Subscribers: hvr, simonmar, ezyang, carter

Differential Revision: https://phabricator.haskell.org/D237

GHC Trac Issues: #9057

5 files changed, 5 insertions, 5 deletions

diff --git a/compiler/count_bytes b/compiler/count_bytes
index bf6240228f..4b8aa37898 100644
--- a/compiler/count_bytes
+++ b/compiler/count_bytes
@@ -1,4 +1,4 @@
-#! /usr/local/bin/perl
+#!/usr/bin/env perl
 #
 %DirCount = ();
 %ModCount = ();
diff --git a/distrib/cross-port b/distrib/cross-port
index 690e60b16a..7c54604ae6 100644
--- a/distrib/cross-port
+++ b/distrib/cross-port
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/usr/bin/env bash
 
 # This script can be used to generate some unregisterised .hc files
 # for bootstrapping GHC on a new/unsupported platform.  It involves a
diff --git a/testsuite/tests/rename/prog006/Setup.lhs b/testsuite/tests/rename/prog006/Setup.lhs
index b28a8234f9..a81e9d221b 100644
--- a/testsuite/tests/rename/prog006/Setup.lhs
+++ b/testsuite/tests/rename/prog006/Setup.lhs
@@ -1,4 +1,4 @@
-#!/usr/bin/runhaskell
+#!/usr/bin/env runhaskell
 > module Main where
 > import Distribution.Simple
 > main :: IO ()
diff --git a/utils/count_lines/count_lines.lprl b/utils/count_lines/count_lines.lprl
index 72b441384e..49b11ee0c7 100644
--- a/utils/count_lines/count_lines.lprl
+++ b/utils/count_lines/count_lines.lprl
@@ -1,4 +1,4 @@
-#! /usr/bin/perl
+#!/usr/bin/env perl
 
 \begin{code}
 
diff --git a/utils/runghc/runghc.hs b/utils/runghc/runghc.hs
index e94c5503c0..42ddb83f25 100644
--- a/utils/runghc/runghc.hs
+++ b/utils/runghc/runghc.hs
@@ -7,7 +7,7 @@
 -- runghc program, for invoking from a #! line in a script.  For example:
 --
 --   script.lhs:
---      #!/usr/bin/env /usr/bin/runghc
+--      #!/usr/bin/env runghc
 --      > main = putStrLn "hello!"
 --
 -- runghc accepts one flag: