RFR (XS) 8217321: [TESTBUG] utilities/test_globalDefinitions.cpp should use _LP64, not LP64

[Aleksey Shipilev]

Bug:
  https://bugs.openjdk.java.net/browse/JDK-8217321

Not sure if we should push it to jdk/jdk12, or just to jdk/jdk, and then backport. I am leaning to
just jdk/jdk.

Fix:

diff -r 495edb72707a test/hotspot/gtest/utilities/test_globalDefinitions.cpp
--- a/test/hotspot/gtest/utilities/test_globalDefinitions.cpp   Thu Jan 17 15:25:11 2019 +0100
+++ b/test/hotspot/gtest/utilities/test_globalDefinitions.cpp   Thu Jan 17 15:56:06 2019 +0100
@@ -103,7 +103,7 @@
   EXPECT_STREQ("M", exact_unit_for_byte_size(M));
   EXPECT_STREQ("B", exact_unit_for_byte_size(M + 1));
   EXPECT_STREQ("K", exact_unit_for_byte_size(M + K));
-#ifdef LP64
+#ifdef _LP64
   EXPECT_STREQ("B", exact_unit_for_byte_size(G - 1));
   EXPECT_STREQ("G", exact_unit_for_byte_size(G));
   EXPECT_STREQ("B", exact_unit_for_byte_size(G + 1));
@@ -123,7 +123,7 @@
   EXPECT_EQ(1u, byte_size_in_exact_unit(M));
   EXPECT_EQ(M + 1, byte_size_in_exact_unit(M + 1));
   EXPECT_EQ(K + 1, byte_size_in_exact_unit(M + K));
-#ifdef LP64
+#ifdef _LP64
   EXPECT_EQ(G - 1, byte_size_in_exact_unit(G - 1));
   EXPECT_EQ(1u, byte_size_in_exact_unit(G));
   EXPECT_EQ(G + 1, byte_size_in_exact_unit(G + 1));

Testing: gtest on Linux x86_64, jdk-submit (running)

Thanks,
-Aleksey