git: openjdk/mobile: 8231717: Improve performance of charset decoding when charset is always compactable

[duke]

Changeset: 0dbfc97c
Author:    Andrew Leonard <aleonard at openjdk.org>
Date:      2019-10-10 10:28:55 +0000
URL:       https://git.openjdk.java.net/mobile/commit/0dbfc97c

8231717: Improve performance of charset decoding when charset is always compactable

Reviewed-by: rriggs, redestad, alanb

! make/data/charsetmapping/SingleByte-X.java.template
! make/jdk/src/classes/build/tools/charsetmapping/SBCS.java
! src/java.base/share/classes/java/lang/StringCoding.java
! src/java.base/share/classes/sun/nio/cs/ArrayDecoder.java
! src/java.base/share/classes/sun/nio/cs/SingleByte.java