6668781: Openjdk windows cygwin build failure: no rule to make linker_md.obj target
Summary: Use of GNU make vpath breaks on windows with C:/ style fullpaths
Reviewed-by: xdono
6638060: Build failed with GNU make 3.81 (part of latest Solaris 'gmake')
Summary: Changes to the way GNU make 3.81 deals with the env variable SHELL
Reviewed-by: xdono