[orthanc] fix rawhide build

[Sebastien Jodogne]

commit eaf6a2ff778d4c5aeb8c25b8a9a7b841558f2959
Author: Jodogne <jodogne at localhost.localdomain>
Date:   Mon Jun 2 16:47:38 2014 +0200

    fix rawhide build

 orthanc.spec |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/orthanc.spec b/orthanc.spec
index a03c588..61a5f48 100644
--- a/orthanc.spec
+++ b/orthanc.spec
@@ -34,6 +34,7 @@ BuildRequires:	jsoncpp-devel
 BuildRequires:	lua-devel >= 5.1.0
 BuildRequires:	doxygen
 BuildRequires:	systemd
+BuildRequires:	gflags-devel  # Necessary for rawhide only
 
 # The following line is required to add the "orthanc" user and group
 Requires(pre):	shadow-utils