[wip/tiago-metapkg-ros-control-sot] Fix archives naming pb.

Bump PKGREVISION to 2 (to make sure)
Added a to tiago-metapkg-ros-control-sot.tar.gz filename.
A first tarball of the package was pushed on robotpkg.
It was wrong (without any impact on the sources), therefore a new one
was generated. I made the assumption that it could be updated without name update
as no binary was generated. But the first tarball archive was kept
inside the system. Therefore if the tarball is not correct, its name should
also be updated.

tiago-metapkg-ros-control-sot/Makefile

@@ -6,10 +6,10 @@ VERSION=		1.0.0
 PKGBASE=		tiago-metapkg-ros-control-sot
 PKGNAME=		${PKGBASE}-${VERSION}
 ROSNAME=		$(subst -,_,${PKGBASE})
-DISTNAME=		${ROSNAME}-${VERSION}
+DISTNAME=		${ROSNAME}-${VERSION}a
 WRKSRC=			${WRKDIR}/${ROSNAME}-${VERSION}
 DIST_SUBDIR=		${PKGBASE}
-PKGREVISION=		1
+PKGREVISION=		2
 
 CATEGORIES=		wip
 HOMEPAGE=		${MASTER_SITE_GITHUB:=stack-of-tasks/${ROSNAME}}

tiago-metapkg-ros-control-sot/distinfo

-SHA1 (tiago-metapkg-ros-control-sot/tiago_metapkg_ros_control_sot-1.0.0.tar.gz) = c2072f74e14584b99be4c385516895ddb0f73b50
-RMD160 (tiago-metapkg-ros-control-sot/tiago_metapkg_ros_control_sot-1.0.0.tar.gz) = 108b3ffc8e86a4112e01d631c92206fdab488238
-Size (tiago-metapkg-ros-control-sot/tiago_metapkg_ros_control_sot-1.0.0.tar.gz) = 6896 bytes
+SHA1 (tiago-metapkg-ros-control-sot/tiago_metapkg_ros_control_sot-1.0.0a.tar.gz) = c2072f74e14584b99be4c385516895ddb0f73b50
+RMD160 (tiago-metapkg-ros-control-sot/tiago_metapkg_ros_control_sot-1.0.0a.tar.gz) = 108b3ffc8e86a4112e01d631c92206fdab488238
+Size (tiago-metapkg-ros-control-sot/tiago_metapkg_ros_control_sot-1.0.0a.tar.gz) = 6896 bytes