base.bbclass: When we use fakeroot, also use it for devshell

Its generally useful for devshell to end up in the fakeroot environment. If
a user needs to exit it, PSEUDO_UNLOAD=1 <command> works, its usually
harder to enter the envionment.

[YOCTO #3374]

(From OE-Core rev: e6ffc747a8ca5142c9bc6fbd2b06b5808bb38b02)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/base.bbclass

@@ -489,6 +489,8 @@ python () {
         d.setVarFlag('do_package', 'fakeroot', 1)
         d.setVarFlag('do_package', 'umask', 022)
         d.setVarFlag('do_package_setscene', 'fakeroot', 1)
+        d.setVarFlag('do_devshell', 'fakeroot', 1)
+        d.appendVarFlag('do_devshell', 'depends', ' virtual/fakeroot-native:do_populate_sysroot')
     source_mirror_fetch = d.getVar('SOURCE_MIRROR_FETCH', 0)
     if not source_mirror_fetch:
         need_host = d.getVar('COMPATIBLE_HOST', True)