Adding fortran 90 includes and missing .so files.

These changes ensure that the include files for the fortran 90
interface are copied, and that all the shared object files are also
copied, providing

/usr/lib64/libpetsc.so.3.5.1
/usr/lib64/libpetsc.so.3.5 -> libpetsc.so.3.5.1
/usr/lib64/libpetsc.so -> libpetsc.so.3.5.1

"doins -r" will include directories recursively. So you can simply do

doins -r include/finclude/*.h90 ftn-auto ftn-custom