Fix Windows image entrypoint paths for parity with Linux

Tekton expects to find the entrypoint binary in '/ko-app/entrypoint'
which is equivalent to 'C:\ko-app\entrypoint' on Windows. See
'pkg/pod/entrypoint.go:orderContainers()'. Currently entrypoint is
stored in 'C:\ProgramData\tektoncd\pipeline\entrypoint.exe' causing
this to break on Windows. To avoid the need for platform-specific
logic in the controller, and for parity with Linux, this change
updates 'entrypoint' and 'nop' images for Windows to store binaries
in 'C:\ko-app\'.

images/windows/entrypoint/Dockerfile

@@ -6,11 +6,11 @@ COPY . c:/gopath/src/github.com/tektoncd/pipeline
 
 WORKDIR c:/gopath/src/github.com/tektoncd/pipeline
 
-RUN go build -o c:/gopath/bin/entrypoint.exe ./cmd/entrypoint
+RUN go build -o c:/gopath/bin/entrypoint ./cmd/entrypoint
 
 FROM ${BASE_IMAGE}
 
-COPY --from=builder c:/gopath/bin/entrypoint.exe c:/ProgramData/tektoncd/pipeline/entrypoint.exe
+COPY --from=builder c:/gopath/bin/entrypoint c:/ko-app/entrypoint
 
 # Copy kodata into the image
 # NOTE: The COPY instruction does not follow symbolic links
@@ -20,4 +20,4 @@ COPY ./.git/refs c:/ProgramData/tektoncd/pipeline/data/refs/
 
 COPY ./third_party c:/ProgramData/tektoncd/pipeline/data/third-party/
 
-ENTRYPOINT ["c:/ProgramData/tektoncd/pipeline/entrypoint.exe"]
+ENTRYPOINT ["c:/ko-app/entrypoint"]

images/windows/nop/Dockerfile

@@ -6,11 +6,11 @@ COPY . c:/gopath/src/github.com/tektoncd/pipeline
 
 WORKDIR c:/gopath/src/github.com/tektoncd/pipeline
 
-RUN go build -o c:/gopath/bin/nop.exe ./cmd/nop
+RUN go build -o c:/gopath/bin/nop ./cmd/nop
 
 FROM ${BASE_IMAGE}
 
-COPY --from=builder c:/gopath/bin/nop.exe c:/ProgramData/tektoncd/pipeline/nop.exe
+COPY --from=builder c:/gopath/bin/nop c:/ko-app/nop
 
 # Copy kodata into the image
 # NOTE: The COPY instruction does not follow symbolic links
@@ -20,4 +20,4 @@ COPY ./.git/refs c:/ProgramData/tektoncd/pipeline/data/refs/
 
 COPY ./third_party c:/ProgramData/tektoncd/pipeline/data/third-party/
 
-ENTRYPOINT ["c:/ProgramData/tektoncd/pipeline/nop.exe"]
+ENTRYPOINT ["c:/ko-app/nop"]