FLAVORS: Reorder so the default is first.

It is documented that the first FLAVOR is the default.  Due to some use
of DEFAULT_VERSIONS and USES, the default FLAVOR may be determined
dynamically.  Poudriere in particular expects the default to be first
and does the wrong thing for emacs ports currently [1].  This resolves
that and avoids other tools making the same mistake.

PR:		225659 comment #14
Approved by:	portmgr (implicit)


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@464273 35697150-7ecd-e111-bb59-0022644237b5

Mk/bsd.port.mk

@@ -1492,6 +1492,11 @@ IGNORE=	Unknown flavor '${FLAVOR}', possible flavors: ${FLAVORS}.
 FLAVOR=	${FLAVORS:[1]}
 .endif
 
+# Reorder FLAVORS so the default is first if set by the port.
+.if empty(_FLAVOR) && !empty(FLAVORS) && !empty(FLAVOR)
+FLAVORS:=	${FLAVOR} ${FLAVORS:N${FLAVOR}}
+.endif
+
 .if !empty(FLAVOR) && !defined(_DID_FLAVORS_HELPERS)
 _DID_FLAVORS_HELPERS=	yes
 _FLAVOR_HELPERS_OVERRIDE=	DESCR PLIST PKGNAMEPREFIX PKGNAMESUFFIX