hg: code-tools/jtreg: make jtreg build accept /cygdrive paths on Windows; remove superfluous -rf options from usages of $(RM)

[jonathan.gibbons at oracle.com]

Changeset: 8f44b4e1f37b
Author:    jjg
Date:      2013-10-31 16:10 -0700
URL:       http://hg.openjdk.java.net/code-tools/jtreg/rev/8f44b4e1f37b

make jtreg build accept /cygdrive paths on Windows; remove superfluous -rf options from usages of $(RM)

! make/Defs.gmk
! make/jtreg.gmk
! make/tests/BadTests.gmk
! make/tests/BugIdTests.gmk
! make/tests/CPAppendTests.gmk
! make/tests/CleanupTest.gmk
! make/tests/CompileTests.gmk
! make/tests/ControlTest.gmk
! make/tests/DupTest.gmk
! make/tests/EnvTest.gmk
! make/tests/ExclusiveAccessTest.gmk
! make/tests/ExitCodeTest.gmk
! make/tests/JDK11Test.gmk
! make/tests/JavacExitCodeTests.gmk
! make/tests/MultiRunTest.gmk
! make/tests/NoJUnit.gmk
! make/tests/OpenFileTests.gmk
! make/tests/ProblemList.gmk
! make/tests/RerunTest.gmk
! make/tests/StatsTests.gmk
! make/tests/T7113596.gmk
! make/tests/TimelimitTests.gmk
! make/tests/TimeoutTest.gmk