buildhistory: fix handling of RDEPENDS style strings

buildhistory: fix handling of RDEPENDS style strings

RDEPENDS style strings are regex searched for entries matching
the usual, allowed package names (plus possible version flags).
RPROVIDES however, is also allowed to contain actual file paths
like '/bin/sh', which get broken by the current implementation.

Use bb.utils to handle RDEPENDS style stings.

Signed-off-by: Adam Blank <adam.blank.g@gmail.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>