6923123: Hotspot refuses to start when -Xmx4m or -Xms4m is specified

Summary: Reduce NewSize from 4m to 1m.
Reviewed-by: tonyp, jmasa

src/share/vm/runtime/globals.hpp

@@ -2925,7 +2925,7 @@ class CommandLineFlags {
   product(uintx, OldSize, ScaleForWordSize(4*M),                            \
           "Initial tenured generation size (in bytes)")                     \
                                                                             \
-  product(uintx, NewSize, ScaleForWordSize(4*M),                            \
+  product(uintx, NewSize, ScaleForWordSize(1*M),                            \
           "Initial new generation size (in bytes)")                         \
                                                                             \
   product(uintx, MaxNewSize, max_uintx,                                     \