meta-phosphor: obmc-phosphor-debug-tarball.bbclass: set LICENSE field

Set LICENSE field explicitly.

Change-Id: I79153e5a462567b0ab85d02c0e19955831f58f9f
Signed-off-by: Patrick Venture <venture@google.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/classes/obmc-phosphor-debug-tarball.bbclass b/classes/obmc-phosphor-debug-tarball.bbclass
index 5282678..d4088ce 100644
--- a/classes/obmc-phosphor-debug-tarball.bbclass
+++ b/classes/obmc-phosphor-debug-tarball.bbclass
@@ -4,7 +4,8 @@
 IMAGE_FSTYPES = "tar.xz"
 
 inherit image
-inherit obmc-phosphor-license
+
+LICENSE = "Apache-2.0"
 
 IMAGE_INSTALL_append = " busybox packagegroup-obmc-phosphor-debugtools perf "