webkitdevci: add sysprof-staticdev as build dependency

[clopez]

When WPE is built with -DUSE_SYSTEM_SYSPROF_CAPTURE=ON it looks for a static library (.a) named sysprof-capture-4, but yocto by default ships static libraries in a -staticdev package that is not included by default on the sysroot.

So explicitly include the -staticdev package in this case