JDK 10 RFR of JDK-8173383: Update JDK build to use -source and -target 10

[Joseph D. Darcy]

Hello,

With the opening of the JDK 10 forests, the build should be updated to 
use the new source and target options (JDK-8028546:
Add -source 10 and -target 10 to javac)

Please review the changes for

     JDK-8173383: Update JDK build to use -source and -target 10
     http://cr.openjdk.java.net/~darcy/8173383.0/

Patch below.

Thanks,

-Joe

--- old/make/common/SetupJavaCompilers.gmk    2017-01-25 
18:02:28.935118958 -0800
+++ new/make/common/SetupJavaCompilers.gmk    2017-01-25 
18:02:28.843118954 -0800
@@ -69,7 +69,7 @@
  $(eval $(call SetupJavaCompiler,GENERATE_JDKBYTECODE, \
      JVM := $(JAVA_JAVAC), \
      JAVAC := $(NEW_JAVAC), \
-    FLAGS := -source 9 -target 9 \
+    FLAGS := -source 10 -target 10 \
          -encoding ascii -XDignore.symbol.file=true $(JAVAC_WARNINGS), \
      SERVER_DIR := $(SJAVAC_SERVER_DIR), \
      SERVER_JVM := $(SJAVAC_SERVER_JAVA)))
@@ -79,7 +79,7 @@
  $(eval $(call SetupJavaCompiler,GENERATE_JDKBYTECODE_NOWARNINGS, \
      JVM := $(JAVA_JAVAC), \
      JAVAC := $(NEW_JAVAC), \
-    FLAGS := -source 9 -target 9 \
+    FLAGS := -source 10 -target 10 \
          -encoding ascii -XDignore.symbol.file=true $(DISABLE_WARNINGS), \
      SERVER_DIR := $(SJAVAC_SERVER_DIR), \
      SERVER_JVM := $(SJAVAC_SERVER_JAVA)))