RFR: 8242209: Increase web native thread stack size for x86 mode

[Arun Joseph]

CLoop interpreter used in 32-bit Windows uses 87 KB of stack space each time CLoop::execute() is called. For web native
threads which has a default stack size of 320 KB, a Stack Overflow Error is raised just after two calls to execute()
function. While 64-bit windows has a default stack size of 1 MB.

Fix: Increase the thread stack size of web native threads for x86 to 1 MB.

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Commit messages:
 - 8242209: Increase web native thread stack size for x86 mode

Changes: https://git.openjdk.java.net/jfx/pull/159/files
 Webrev: https://webrevs.openjdk.java.net/jfx/159/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8242209
  Stats: 8 lines in 1 file changed: 7 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jfx/pull/159.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/159/head:pull/159

PR: https://git.openjdk.java.net/jfx/pull/159