8176099: --with-build-jdk and --with-boot-jdk not working with JDK 10

Reviewed-by: erikj

make/autoconf/boot-jdk.m4

@@ -77,10 +77,10 @@ AC_DEFUN([BOOTJDK_DO_CHECK],
           BOOT_JDK_VERSION=`"$BOOT_JDK/bin/java" -version 2>&1 | $HEAD -n 1`
 
           # Extra M4 quote needed to protect [] in grep expression.
-          [FOUND_CORRECT_VERSION=`$ECHO $BOOT_JDK_VERSION | $EGREP '\"9([\.+-].*)?\"|(1\.[89]\.)'`]
+          [FOUND_CORRECT_VERSION=`$ECHO $BOOT_JDK_VERSION | $EGREP '\"10([\.+-].*)?\"|\"9([\.+-].*)?\"|(1\.[89]\.)'`]
           if test "x$FOUND_CORRECT_VERSION" = x; then
             AC_MSG_NOTICE([Potential Boot JDK found at $BOOT_JDK is incorrect JDK version ($BOOT_JDK_VERSION); ignoring])
-            AC_MSG_NOTICE([(Your Boot JDK must be version 8 or 9)])
+            AC_MSG_NOTICE([(Your Boot JDK must be version 8, 9 or 10)])
             BOOT_JDK_FOUND=no
           else
             # We're done! :-)
@@ -469,10 +469,10 @@ AC_DEFUN([BOOTJDK_CHECK_BUILD_JDK],
         BUILD_JDK_VERSION=`"$BUILD_JDK/bin/java" -version 2>&1 | $HEAD -n 1`
 
         # Extra M4 quote needed to protect [] in grep expression.
-        [FOUND_CORRECT_VERSION=`echo $BUILD_JDK_VERSION | $EGREP '\"9([\.+-].*)?\"'`]
+        [FOUND_CORRECT_VERSION=`echo $BUILD_JDK_VERSION | $EGREP '\"10([\.+-].*)?\"'`]
         if test "x$FOUND_CORRECT_VERSION" = x; then
           AC_MSG_NOTICE([Potential Build JDK found at $BUILD_JDK is incorrect JDK version ($BUILD_JDK_VERSION); ignoring])
-          AC_MSG_NOTICE([(Your Build JDK must be version 9)])
+          AC_MSG_NOTICE([(Your Build JDK must be version 10)])
           BUILD_JDK_FOUND=no
         else
           # We're done!