RFR: 8290899: java/lang/String/StringRepeat.java test requests too much heap on windows x86

[Sergey Bylokhov]

The `java/lang/String/StringRepeat.java` test was updated twice after integration:

https://bugs.openjdk.org/browse/JDK-8221400 - the xmx4g was replaced by the xmx2g
https://bugs.openjdk.org/browse/JDK-8265421 - the "os.maxMemory >= 2G" was added

Unfortunately, this test still may fail on Windows x86 due to: `Could not reserve enough space for xxx object heap.`

This is a request to exclude it on win x86 since that JDK cannot allocate 2g.

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Commit messages:
 - 8290899: java/lang/String/StringRepeat.java test requests too much heap on windows x86

Changes: https://git.openjdk.org/jdk/pull/11639/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11639&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8290899
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/11639.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11639/head:pull/11639

PR: https://git.openjdk.org/jdk/pull/11639