hg: code-tools/jtreg: Add basic support for Help>About jtreg

[jonathan.gibbons at oracle.com]

Changeset: 556cf0953931
Author:    jjg
Date:      2018-02-06 14:42 -0800
URL:       http://hg.openjdk.java.net/code-tools/jtreg/rev/556cf0953931

Add basic support for Help>About jtreg

! make/Rules.gmk
! make/jtreg.gmk
! src/share/classes/com/sun/javatest/regtest/config/RegressionTestSuite.java
+ src/share/classes/com/sun/javatest/regtest/tool/RegressionContextManager.java
! src/share/classes/com/sun/javatest/regtest/tool/Tool.java
- src/share/classes/com/sun/javatest/regtest/tool/jtlogo.gif
+ src/share/classes/com/sun/javatest/regtest/tool/jtlogo.png