The apr-native provides usr/share/build-1/libtool which is required by
the recipe such as apache2-native. If we don't set the CONFIG_SHELL to
/bin/bash, then:
1) If we build apr-native on a host which is "/bin/sh -> bash", the
interpreter in usr/share/build-1/libtool would be "#!/bin/sh".
2) When we re-use apr-native's sstate on a host which is
"/bin/sh -> dash", there would be errors.
Signed-off-by: Robert Yang <liezhi.yang@windriver.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
