run-ptest: fix bashism

run-ptest: fix bashism

These script use /bin/sh as the interpreter, but contains bashism:
    recipes-devtools/insserv/files/run-ptest
    recipes-devtools/quilt/quilt/run-ptest
    recipes-devtools/tcltk/tcl/run-ptest
    recipes-extended/gawk/gawk-4.1.1/run-ptest
    recipes-support/beecrypt/beecrypt/run-ptest

Fixed:
    "==" -> "=" (should be -eq when integer)
    "&>log" -> ">log 2>&1"

And quilt's test scripts requires bash, add bash to RDEPENDS_quilt-ptest

(From OE-Core rev: 70c6e0b84d3e17807cbea0677df2f0772a284130)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>