Use bash_bootstrap for the bootstrap build.

* don't build the in-tree bash.
* bash doesn't need to be a mandatory package, it's now a dependency of
the haiku package.

build/jam/repositories/HaikuPortsCross/ppc

@@ -12,6 +12,7 @@ BootstrapPackageRepository HaikuPortsCross
 	# repository architecture packages (stage 1)
 	autoconf_bootstrap-2.69-2
 	automake_bootstrap-1.13.1-1
+	bash_bootstrap-4.3.27-1	
 	binutils_bootstrap-2.24_2014_03_19-1
 	bison_bootstrap-2.4.3-1
 	flex_bootstrap-2.5.35-1
@@ -40,6 +41,7 @@ BootstrapPackageRepository HaikuPortsCross
 	# source packages
 	autoconf_bootstrap
 	automake_bootstrap
+	bash_bootstrap
 	binutils_bootstrap
 	bison_bootstrap
 	flex_bootstrap