add build --verbose option for build script

shows kernel messages (only) atm

NEWS

@@ -1,5 +1,5 @@
 0.176.0
-  -
+  - add --verbose option to build command
 
 0.175.0
   - do not crash when running "osc search --binary --verbose foo"

osc/build.py

@@ -742,6 +742,8 @@ def main(apiurl, opts, argv):
     if opts.multibuild_package:
         buildargs.append('--buildflavor=%s' % opts.multibuild_package)
         pac = pac + ":" + opts.multibuild_package
+    if opts.verbose:
+        buildargs.append('--verbose=%s' % opts.verbose)
     if opts.wipe:
         buildargs.append("--wipe")
 

osc/commandline.py

@@ -6541,6 +6541,8 @@ Please submit there instead, or use --nodevelproject to force direct submission.
                   help='only fetch packages from the api')
     @cmdln.option('--oldpackages', metavar='DIR',
             help='take previous build from DIR (special values: _self, _link)')
+    @cmdln.option('--verbose', metavar='VERBOSE',
+                  help='set a verbose mode, arguments can be "all" or "vm"')
     @cmdln.option('--wipe', action='store_true',
                   help=SUPPRESS_HELP)
     @cmdln.option('--shell', action='store_true',