Consistently use `#! /usr/bin/env bash' as shebang (#2308)

This increase portability of semgrep on platforms not having bash as
/bin/bash.

scripts/build-wheels.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#! /usr/bin/env bash
 set -e
 pip install setuptools wheel
 cd semgrep && python setup.py sdist bdist_wheel

scripts/osx-release.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#! /usr/bin/env bash
 set -e
 brew install opam pkg-config coreutils
 opam init --no-setup --bare;

scripts/ubuntu-generic.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#! /usr/bin/env bash
 set -e
 version="${VERSION:?Set a version to install}"
 tarball=semgrep-v$version-ubuntu-16.04.tgz

scripts/ubuntu-release.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#! /usr/bin/env bash
 #
 # Make a semgrep release for Linux x86_64.
 #

scripts/validate-docker-release.sh

@@ -1,4 +1,4 @@
-#!/bin/bash -e
+#! /usr/bin/env bash -e
 version="${GITHUB_REF/refs\/tags\//}"
 version="${version:-$VERSION}"
 version="${version:?Version must be set}"

scripts/validate-osx-release.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#! /usr/bin/env bash
 set -e
 
 echo "Loading version from file: $(cat version)"

semgrep-core/cli/flags.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#! /usr/bin/env bash
 #
 # Use static linking if platform allows.
 #

semgrep-core/tests/report_test_metrics.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#! /usr/bin/env bash
 set -e
 HOST="https://dashboard.semgrep.dev"
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"

semgrep/tests/run-perf-tests.sh

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