Fix brace matching on multiline constructs in perl.req (RhBug:752119)

Fix brace matching on multiline constructs in perl.req (RhBug:752119)

- /usr/lib/rpm/perl.req scans for the opening brace type on lines, but
  then only scans for closing curly braces ('}') instead of the proper
  losing brace type when that closing brace occures on a different line.
  This means that any use/require statements that occur after the
  multi-line q{} statement but before the first closing curly brace in
  the file will be ignored.

Signed-off-by: Panu Matilainen <pmatilai@redhat.com>