Refs #25328 Use a portable shebang

Refs #25328 Use a portable shebang

BSD systems don't place bash in /bin and a lot of the dart tools
hardcode a #!/bin/bash shebang that fails the 'all' target build
(not able to execute dart2js since the interpreter is not found).

Solve the issue by using #!/usr/bin/env as the shebang. For scripts
that need to pass arguments to bash modify the script to use the set
command as the first executed line of shell.

BUG=
R=whesse@google.com

Committed: https://github.com/dart-lang/sdk/commit/634e5a1d02f64cbb0922161433366fde3fd19b4d

[Bill Hesse, 2016-01-05 14:05:28]

whesse@google.com changed reviewers:
+ ricow@google.com, whesse@google.com

[Bill Hesse, 2016-01-05 14:05:29]

LGTM.

[Bill Hesse, 2016-01-05 15:26:33]

Description was changed from

==========
Refs #25328 Use a portable shebang

BSD systems don't place bash in /bin and a lot of the dart tools
hardcode a #!/bin/bash shebang that fails the 'all' target build
(not able to execute dart2js since the interpreter is not found).

Solve the issue by using #!/usr/bin/env as the shebang. For scripts
that need to pass arguments to bash modify the script to use the set
command as the first executed line of shell.

BUG=
==========

to

==========
Refs #25328 Use a portable shebang

BSD systems don't place bash in /bin and a lot of the dart tools
hardcode a #!/bin/bash shebang that fails the 'all' target build
(not able to execute dart2js since the interpreter is not found).

Solve the issue by using #!/usr/bin/env as the shebang. For scripts
that need to pass arguments to bash modify the script to use the set
command as the first executed line of shell.

BUG=
R=whesse@google.com

Committed:
https://github.com/dart-lang/sdk/commit/634e5a1d02f64cbb0922161433366fde3fd19b4d
==========

[Bill Hesse, 2016-01-05 15:26:34]

Committed patchset #1 (id:1) manually as
634e5a1d02f64cbb0922161433366fde3fd19b4d (presubmit successful).