diff -up thunderbird-52.3.0/mozilla/media/libstagefright/binding/mp4parse_capi/Cargo.toml.toml-fix thunderbird-52.3.0/mozilla/media/libstagefright/binding/mp4parse_capi/Cargo.toml
--- thunderbird-52.3.0/mozilla/media/libstagefright/binding/mp4parse_capi/Cargo.toml.toml-fix	2017-08-21 10:51:01.408785691 +0200
+++ thunderbird-52.3.0/mozilla/media/libstagefright/binding/mp4parse_capi/Cargo.toml	2017-08-21 10:51:05.904787854 +0200
@@ -20,8 +20,6 @@ exclude = [
 
 build = false
 
-build = false
-
 [dependencies]
 "mp4parse" = {version = "0.6.0", path = "../mp4parse"}