common: Fix bash shell script invocation

`#!/usr/bin/env bash` should be used to avoid hard paths.

To address:

  dockcross-manylinux-x64: bad interpreter: /bin/bash^M: no such file or directory

imagefiles/build-and-install-cmake.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -ex
 

imagefiles/build-and-install-curl.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -ex
 

imagefiles/build-and-install-git.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -ex
 

imagefiles/build-and-install-ninja.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #
 # Configure, build and install ninja

imagefiles/build-and-install-openssh.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -ex
 

imagefiles/build-and-install-openssl.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Configure, build and install OpenSSL
 #

imagefiles/ccmake.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
 # Always pass the CMAKE_TOOLCHAIN_FILE variable to CMake when inside a
 # dockcross environment -- the CMAKE_TOOLCHAIN_FILE environmental variable is

imagefiles/cmake.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 
 # Always pass the CMAKE_TOOLCHAIN_FILE variable to CMake when inside a
 # dockcross environment -- the CMAKE_TOOLCHAIN_FILE environmental variable is

imagefiles/dockcross

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 DEFAULT_DOCKCROSS_IMAGE=dockcross/base  # DO NOT MOVE THIS LINE (see entrypoint.sh)
 

imagefiles/entrypoint.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # This is the entrypoint script for the dockerfile. Executed in the
 # container at runtime.

imagefiles/install-cmake-binary.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -ex
 set -o pipefail

imagefiles/install-crosstool-ng-toolchain.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # This script operates in a current working directory. It downloads
 # "crosstool-ng", installs the base package, and then configures and installs

imagefiles/install-gosu-binary.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -ex
 set -o pipefail

imagefiles/install-liquidprompt-binary.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -ex
 

imagefiles/install-python-packages.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -e
 set -o pipefail

imagefiles/utils.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -e