toolchain: glibc ldd env path fixup

This replace the shell script header of ldd
when it install to `/usr/bin/ldd` where
`#! /..../staging_dir/host/bin/bash`
should be
`#!/bin/sh`

Signed-off-by: Chen Minqiang <ptpt52@gmail.com>

package/libs/toolchain/Makefile

@@ -614,6 +614,7 @@ ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
   define Package/ldd/install
 	$(INSTALL_DIR) $(1)/usr/bin/
 	$(CP) $(TOOLCHAIN_DIR)/bin/ldd $(1)/usr/bin/
+	sed -i 's,^#!.*,#!/bin/sh,' $(1)/usr/bin/ldd
   endef
 
   define Package/ldconfig/install