libcamera: Make IPA module signing mandatory for the meantime

IPA module signing is optional, but when not available due to missing
dependencies, we hit failures due to a non fully implemented IPA
isolation. Make module signing mandatory until isolation is functional.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/libcamera/meson.build

@@ -62,7 +62,7 @@ subdir('proxy')
 
 libatomic = cc.find_library('atomic', required : false)
 libdl = cc.find_library('dl')
-libgnutls = cc.find_library('gnutls', required : false)
+libgnutls = cc.find_library('gnutls', required : true)
 libudev = dependency('libudev', required : false)
 
 if libgnutls.found()