libdrm: Update version from 2.4.97 to 2.4.98

From the [announcement][1]:

> This release adds marketing names for AMDGPU devices, a fallback path in
> drmDevice for devices lacking OF data and drmIsMaster API, amongst other
> changes.

[1]: https://lists.x.org/archives/xorg-announce/2019-April/002992.html

libdrm.be0

@@ -1,6 +1,6 @@
 #!/usr/bin/env beesh
 
-# BEE_VERSION libdrm-2.4.97-0
+# BEE_VERSION libdrm-2.4.98-0
 
 ## this file was created by bee init and should be executed to build a
 ## bee-package. (Additional hints are located at the end of this file.)