Set $PERL5LIB properly in hydra-init in "make check"

Dependencies

• [2] OB7GB5DL Test environment cleanups
• [3] AMFMXR52 Provide a command ‘hydra-init’ to initialise/upgrade the database
• [4] WHS5RMPO
• [5] JRVI4XTV tests: Use $(builddir) instead of `pwd`.
• [6] PVBTVPKJ nix needs env vars as absolute paths
• [7] VOBFCHIX use top_srcdir in stead of srcdir
• [8] WFJ3ZPRM add tests for scm inputs
• [9] EDDTVGB4 set BZR_HOME env var so bzr won't fail
• [10] RBZRCTAL hydra: fixed and re-enabled evaluation tests
• [11] PWU6YAQA add NIX_MANIFESTS_DIR to tests
• [12] G2ZB6464 first test, not yet in buildprocess
• [*] V2ALOFRR Fix the test

Change contents

• edit in tests/Makefile.am at line 1
  [4.92]

  [14.116]
  + perl5lib = "$(srcdir):$(top_srcdir)/src/lib:$$PERL5LIB"

  +
• replacement in tests/Makefile.am at line 15
  [2.24]→[4.296:354](∅→∅),[4.190]→[4.296:354](∅→∅),[4.296]→[4.296:354](∅→∅)
  − PERL5LIB="$(srcdir):$(top_srcdir)/src/lib:$$PERL5LIB" \
  [2.24]

  [4.48]
  + PERL5LIB=$(perl5lib) \
• replacement in tests/Makefile.am at line 36
  [4.51]→[3.4517:4559](∅→∅)
  − perl $(top_srcdir)/src/script/hydra-init
  [4.51]

  [4.0]
  + PERL5LIB=$(perl5lib) perl $(top_srcdir)/src/script/hydra-init