8149116: Make test/Makefile more silent

[Erik Helin]

Hi all,

this tiny patch makes the common test targets in test/Makefile a bit
more silent. The patch silences the `make` command and also silences the
"Entering directory" output from make. For example, running
`make test-hotspot-internal` currently prints:

  Building target 'test-hotspot-internal' in configuration 'x64-slow'
  make[3]: warning: -jN forced in submake: disabling jobserver mode.
  make -k -C /home/ehelin/code/jdk9/dev/hotspot/test CONCURRENCY=1 TEST=hotspot_internal hotspot_internal
  make[4]: Entering directory '/home/ehelin/code/jdk9/dev/hotspot/test'

and with the patch applied it prints:

  Building target 'test-hotspot-internal' in configuration 'x64-slow'
  make[3]: warning: -jN forced in submake: disabling jobserver mode.

Unfortunately I don't know how to get rid of the warning
"-jN forced in submake" :( Anyway, below is the patch:

# HG changeset patch
# User ehelin
# Date 1454675226 -3600
#      Fri Feb 05 13:27:06 2016 +0100
# Node ID e0f7bec5f61d3619e78f4d1683e208012f1709f5
# Parent  3ca929279adbdbbe590abb727dbaf9e4a9c6bf69
8149116: Make test/Makefile more silent

diff -r 3ca929279adb -r e0f7bec5f61d test/Makefile
--- a/test/Makefile     Fri Feb 05 09:41:16 2016 +0100
+++ b/test/Makefile     Fri Feb 05 13:27:06 2016 +0100
@@ -40,8 +40,7 @@
 define SUBDIR_TEST # subdirectory target
 if [ -d $1 ] ; then \
   if [ -r $1/test/Makefile ] ; then \
-    echo "$(MAKE) -k -C $1/test $2" ; \
-    $(MAKE) -k -C $1/test $2 ; \
+    $(MAKE) --no-print-directory -k -C $1/test $2 ; \
   else \
     echo "ERROR: File does not exist: $1/test/Makefile"; \
     exit 1; \

Thanks,
Erik