pgsql: Make all our flex and bison files use %option prefix or

Log Message:
-----------
Make all our flex and bison files use %option prefix or %name-prefix
(respectively) to rename yylex and related symbols. Some were doing
it this way already, while others used not-too-reliable sed hacks in
the Makefiles. It's all nice and consistent now.

Modified Files:
--------------
pgsql/contrib/cube:
cubeparse.y (r1.14 -> r1.15)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/cube/cubeparse.y.diff?r1=1.14&r2=1.15)
Makefile (r1.16 -> r1.17)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/cube/Makefile.diff?r1=1.16&r2=1.17)
pgsql/contrib/seg:
Makefile (r1.15 -> r1.16)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/seg/Makefile.diff?r1=1.15&r2=1.16)
segparse.y (r1.15 -> r1.16)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/seg/segparse.y.diff?r1=1.15&r2=1.16)
pgsql/src/backend/bootstrap:
bootparse.y (r1.79 -> r1.80)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/bootstrap/bootparse.y.diff?r1=1.79&r2=1.80)
bootscanner.l (r1.41 -> r1.42)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/bootstrap/bootscanner.l.diff?r1=1.41&r2=1.42)
bootstrap.c (r1.212 -> r1.213)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/bootstrap/bootstrap.c.diff?r1=1.212&r2=1.213)
Makefile (r1.33 -> r1.34)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/bootstrap/Makefile.diff?r1=1.33&r2=1.34)
pgsql/src/backend/utils/misc:
guc-file.l (r1.36 -> r1.37)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/misc/guc-file.l.diff?r1=1.36&r2=1.37)
Makefile (r1.24 -> r1.25)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/misc/Makefile.diff?r1=1.24&r2=1.25)
pgsql/src/include/bootstrap:
bootstrap.h (r1.40 -> r1.41)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/bootstrap/bootstrap.h.diff?r1=1.40&r2=1.41)
pgsql/src/pl/plpgsql/src:
gram.y (r1.85 -> r1.86)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpgsql/src/gram.y.diff?r1=1.85&r2=1.86)
Makefile (r1.28 -> r1.29)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpgsql/src/Makefile.diff?r1=1.28&r2=1.29)
pl_comp.c (r1.98 -> r1.99)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpgsql/src/pl_comp.c.diff?r1=1.98&r2=1.99)
plpgsql.h (r1.67 -> r1.68)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpgsql/src/plpgsql.h.diff?r1=1.67&r2=1.68)
scan.l (r1.43 -> r1.44)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpgsql/src/scan.l.diff?r1=1.43&r2=1.44)