JDK-8180600: make run-test does not work with jib test dependencies

[Erik Joelsson]

The new run-test target does not work with the new jib test dependencies 
feature in jdk10-hs. The fix is small, just adding JIB_JAR to the 
command line for jtreg if present, as is done in make/TestCommon.gmk.

Bug: https://bugs.openjdk.java.net/browse/JDK-8180600

Patch:

diff -r 91ac8096f365 make/RunTests.gmk
--- a/make/RunTests.gmk
+++ b/make/RunTests.gmk
@@ -358,6 +358,10 @@
      $1_JTREG_BASIC_OPTIONS += -nativepath:$$($1_JTREG_NATIVEPATH)
    endif

+  ifneq ($(JIB_JAR), )
+    $1_JTREG_BASIC_OPTIONS += -cpa:$(JIB_JAR)
+  endif
+
    run-test-$1:
      $$(call LogWarn)
      $$(call LogWarn, Running test '$$($1_TEST)')


/Erik