Switch from Bourne shell to simply base shell to build libfuzzer

Summary: It is not necessary launching the build script with bash.

Reviewers: krytarowski

Reviewed By: krytarowski

Subscribers: llvm-commits, #sanitizers

Differential Revision: https://reviews.llvm.org/D42008

llvm-svn: 322422

compiler-rt/lib/fuzzer/build.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 LIBFUZZER_SRC_DIR=$(dirname $0)
 CXX="${CXX:-clang}"
 for f in $LIBFUZZER_SRC_DIR/*.cpp; do