bash ptest: Sed away the Makefile dependency to remove error messages.

bash ptest: Sed away the Makefile dependency to remove error messages.

The bash Makefile defines a dependency on itself and tries to run configure,
causing error messages when running ptest on target:

make: *** No rule to make target `configure.in', needed by `configure'.
make: *** No rule to make target `aclocal.m4', needed by `configure'.
make: *** No rule to make target `config.h.in', needed by `configure'.
make: *** No rule to make target `Makefile.in', needed by `Makefile'.
make: Failed to remake makefile `Makefile'.

This patch edits out this dependency in the Makefile installed for ptest,
to get rid of these messages.

(From OE-Core rev: b5fe8c9ff330105337b003be0de2f970545d13ef)

Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>