use abs_builddir for svn checkout

Dependencies

• [2] JRVI4XTV tests: Use $(builddir) instead of `pwd`.
• [3] I3TU2UJQ
• [4] OSZDLGMP add target to make simple git/hg/svn inputs
• [*] G2ZB6464 first test, not yet in buildprocess

Change contents

• replacement in tests/Makefile.am at line 44
  [3.349]→[2.355:404](∅→∅)
  − svn co file://$(builddir)/svn-repo svn-checkout
  [3.349]

  [3.397]
  + svn co file://$(abs_builddir)/svn-repo svn-checkout