fix(env): change the environment to be /usr/bin/env bash

makefile

@@ -13,7 +13,7 @@ LDC := ldc2
 DPARSE_DIR := libdparse
 DSYMBOL_DIR := dsymbol
 
-SHELL:=/bin/bash
+SHELL:=/usr/bin/env bash
 
 githash:
 	@mkdir -p bin

tests/extra/tc_ufcs_all_kinds/run.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 if [ -z "${DC:-}" ]; then
 	DC=dmd

tests/run_tests.sh

@@ -1,4 +1,4 @@
-#! /bin/bash
+#! /usr/bin/env bash
 RED="\033[31m"
 GREEN="\033[32m"
 YELLOW="\033[33m"