build: make autobuild require rpm build deps

I spent far too long on a new machine trying to figure out why
./autobuild.sh failed due to an rpm build failure (complaining
that libvirt_parthelper was supposed to be packaged but was not
built), and finally traced it to a missing parted-devel
installation.  I learned that --nodeps is in place for
autobuilder setups, but for developers, removing it would make
rpmbuild error out much sooner for a less cryptic failure.

* autobuild.sh: Conditionally drop --nodeps from rpmbuild lines.

Signed-off-by: Eric Blake <eblake@redhat.com>

autobuild.sh

@@ -8,6 +8,13 @@ set -v
 test -n "$1" && RESULTS=$1 || RESULTS=results.log
 : ${AUTOBUILD_INSTALL_ROOT=$HOME/builder}
 
+# If run under the autobuilder, we must use --nodeps with rpmbuild;
+# but this can lead to odd error diagnosis for normal development.
+nodeps=
+if test "${AUTOBUILD_COUNTER+set}"; then
+  nodeps=--nodeps
+fi
+
 test -f Makefile && make -k distclean || :
 rm -rf coverage
 
@@ -60,7 +67,7 @@ else
 fi
 
 if test -f /usr/bin/rpmbuild ; then
-  rpmbuild --nodeps \
+  rpmbuild $nodeps \
      --define "extra_release $EXTRA_RELEASE" \
      --define "_sourcedir `pwd`" \
      -ba --clean libvirt.spec
@@ -111,7 +118,7 @@ fi
 
 if test -x /usr/bin/i686-w64-mingw32-gcc && test -x /usr/bin/x86_64-w64-mingw32-gcc ; then
   if test -f /usr/bin/rpmbuild ; then
-    rpmbuild --nodeps \
+    rpmbuild $nodeps \
        --define "extra_release $EXTRA_RELEASE" \
        --define "_sourcedir `pwd`" \
        -ba --clean mingw-libvirt.spec