jdk11 fails to build on Windows with updated cygwin

[sophia-guo]

jdk11 on windows broken
https://github.com/sophia-guo/runaqa/runs/758463431?check_suite_focus=true

TR_BUILD_NAME:        aa9321e4f
J9SRC:                D:\a\runaqa\runaqa\openj9-openjdk-jdk11\build\windows-x86_64-normal-server-release\vm
JIT_SRCBASE:          D:\a\runaqa\runaqa\openj9-openjdk-jdk11\build\windows-x86_64-normal-server-release\vm
JIT_OBJBASE:          D:\a\runaqa\runaqa\openj9-openjdk-jdk11\build\windows-x86_64-normal-server-release\vm/objs
JIT_DLL_DIR:          D:\a\runaqa\runaqa\openj9-openjdk-jdk11\build\windows-x86_64-normal-server-release\vm
OMR_DIR:              D:\a\runaqa\runaqa\openj9-openjdk-jdk11\build\windows-x86_64-normal-server-release\vm/omr
BUILD_CONFIG:         prod
NUMBER_OF_PROCESSORS: 2
VERSION_MAJOR:        11
Compiling 51 files for jdk.internal.opt
ENABLE_GPU:           1
CUDA_HOME:            C:/progra~1/nvidia~2/cuda/v9.0
GDK_HOME:             /NVIDIA/gdk
/usr/bin/make -j 2 -C D:\a\runaqa\runaqa\openj9-openjdk-jdk11\build\windows-x86_64-normal-server-release\vm/compiler -f compiler.mk
make[6]: Entering directory '/cygdrive/d/a/runaqa/runaqa/openj9-openjdk-jdk11/build/windows-x86_64-normal-server-release/vm/compiler'
make[6]: warning: -j2 forced in submake: resetting jobserver mode.
if not exist "D:\a\runaqa\runaqa\openj9-openjdk-jdk11\build\windows-x86_64-normal-server-release\vm\" mkdir "D:\a\runaqa\runaqa\openj9-openjdk-jdk11\build\windows-x86_64-normal-server-release\vm\"
The filename, directory name, or volume label syntax is incorrect.
make[6]: *** [D:/a/runaqa/runaqa/openj9-openjdk-jdk11/build/windows-x86_64-normal-server-release/vm/compiler/build/rules/win-msvc/common.mk:90: jit_createdirs] Error 1
make[6]: Leaving directory '/cygdrive/d/a/runaqa/runaqa/openj9-openjdk-jdk11/build/windows-x86_64-normal-server-release/vm/compiler'
make[5]: *** [makefile:70: default] Error 2

Based on the discussion on https://openj9.slack.com/archives/C862YFGL9/p1592068314032000 we know it was caused by the updated version of cygwin (3.1.4.1 to 3.1.5.1 on June 1) . (Note: make version is same version 4.3.1. ). Though we haven't
figured out the underlying or fundamental issue about it.

[pshipton]

Did you mean to open this issue on the OpenJ9 project?

[pshipton]

fyi eclipse-openj9/openj9#10109