added targets: ar71xx-mikrotik and ramips-mt7621.

Dockerfile

@@ -6,7 +6,7 @@ ENV GLUON_TAG v2017.1.2
 ENV GLUON_RELEASE 0.11.2
 ENV GLUON_BRANCH stable
 ENV GLUON_BROKEN 1
-ENV GLUON_TARGETS ar71xx-generic ar71xx-nand ar71xx-tiny brcm2708-bcm2708 brcm2708-bcm2709 mpc85xx-generic x86-generic x86-64 
+ENV GLUON_TARGETS ar71xx-generic ar71xx-nand ar71xx-tiny ar71xx-mikrotik brcm2708-bcm2708 brcm2708-bcm2709 mpc85xx-generic ramips-mt7621 x86-generic x86-64 
 
 ENV DEBIAN_FRONTEND noninteractive
 ENV DEBIAN_PRIORITY critical