RFR: JDK-8300531: MSVC CFlags look suspicious [v2]

[Justin King]

> Update MSVC CFlags to be more consistent with other compilers. Also disables RTTI in a simliar manner to GCC/Clang for the JVM.

Justin King has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'openjdk:master' into msvc-cflags
 - Update MSVC CFlags
   
   Signed-off-by: Justin King <jcking at google.com>

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/12073/files
  - new: https://git.openjdk.org/jdk/pull/12073/files/adb57ccd..e282971e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12073&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12073&range=00-01

  Stats: 10470 lines in 458 files changed: 6430 ins; 642 del; 3398 mod
  Patch: https://git.openjdk.org/jdk/pull/12073.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12073/head:pull/12073

PR: https://git.openjdk.org/jdk/pull/12073