HandBrake: Improve configure phase

- Stop clearing `configure.pre_args`. The configure script uses the
  `--prefix` flag to define a `PREFIX` variable in the generated
  makefile, which I'll make use of later.
- `--xcode-driver=terminal` prevents the configure script from being run
  a second time during the build phase.
- Compel build to respect `build.jobs`.

git-svn-id: https://svn.macports.org/repository/macports/trunk/dports@132823 d073be05-634f-4543-b044-5fe20cf6d1d6

multimedia/HandBrake/Portfile

@@ -165,11 +165,13 @@ patchfiles \
     missing-delegate.patch
 
 
-configure.pre_args
 configure.args      --arch=${configure.build_arch} \
                     --curl=false \
                     --fetch=curl \
-                    --gcc=${configure.cc}
+                    --gcc='${configure.cc}' \
+                    --verbose \
+                    --xcode-driver=terminal \
+                    BUILD.jobs=${build.jobs}
 
 
 build.dir           ${worksrcpath}/build