(CygbuildTreeSymlinkCopy): bash regexp match CYGBUILD_SHADOW_TOPLEVEL_IGNORE

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
cygbuild.sh: (CygbuildTreeSymlinkCopy): Ad verbose in comments
(CygbuildCmdInstallMain): Create .inst directory

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
(CygbuildBootVariablesGlobalMain): Move .pc dir here

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
(CygbuildPatchApplyQuiltMaybe): pop does not support color option

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
libcheck.sh (CygbuildCmdInstallCheckReadme): no longer README-N.N but README

Signed-off-by: Jari Aalto <jari.aalto@cante.net>