Merge branch 'master' into ng/master

* master:
  tests: merge, tweak and modernize few test scripts
  tests: move coverage about BUILT_SOURCES
  tests: more meaningful names for some test cases
  tests: merge some grepping tests on Yacc support

+ Extra non-trivial changes:

* t/per-target-flags.sh: Sync with the back-ported version that
is in maint and master, that has several bugfixes over the previous
version in ng/master.

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>

diff --cc t/no-spurious-install-recursive.sh
Simple merge

diff --cc t/per-target-flags.sh
index f8b8636923c0a3b2ce23cb7277eb3528df2f0412,e5278fb276b9703cdca4630d0bdbeb703ed0f57e..42853840ee095a671ee01263728187269882ffde
--- 1/t/per-target-flags.sh
--- 2/t/per-target-flags.sh
+++ b/t/per-target-flags.sh
@@@ -17,8 -17,10 +17,10 @@@
  # Test executable-specific and library-specific flags, both with
  # and without dependency tracking.
  
 -. ./defs || Exit 1
 +. ./defs || exit 1
  
+ makefiles='Makefile libMakefile Makefile2 libMakefile2'
+ 
  cat > configure.ac << END
  AC_INIT([$me], [1.0])
  AM_INIT_AUTOMAKE([-Wno-extra-portability])

diff --cc t/suffix-custom-subobj-and-specflg.sh
Simple merge

diff --cc t/yacc-grepping2.sh
Simple merge

diff --cc t/yacc-subdir.sh
Simple merge