As make options were not passed on install phase it recompiled
library in as BUILD=debug mode instead of 'release'.
Also gfortran command called directly as on install phase
it wasn't passed into make command.
Now build type and some other parameters passed in src_prepare
instead of src_compile and src_insall.
Closes: https://bugs.gentoo.org/785739
Signed-off-by: Sergey Torokhov <torokhov-s-a@yandex.ru>
