safra: rename as determinize

* spot/twaalgos/safra.cc, spot/twaalgos/safra.hh: Rename as...
* spot/twaalgos/determinize.cc, spot/twaalgos/determinize.hh: ... these.
* spot/twaalgos/Makefile.am, tests/core/safra.cc: Adjust.

spot/twaalgos/Makefile.am

@@ -38,6 +38,7 @@ twaalgos_HEADERS = \
   copy.hh \
   cycles.hh \
   degen.hh \
+  determinize.hh \
   dot.hh \
   dtbasat.hh \
   dtwasat.hh \
@@ -66,7 +67,6 @@ twaalgos_HEADERS = \
   remfin.hh \
   remprop.hh \
   strength.hh \
-  safra.hh \
   sbacc.hh \
   sccfilter.hh \
   sccinfo.hh \
@@ -94,6 +94,7 @@ libtwaalgos_la_SOURCES = \
   copy.cc \
   cycles.cc \
   degen.cc \
+  determinize.cc \
   dot.cc \
   dtbasat.cc \
   dtwasat.cc \
@@ -122,7 +123,6 @@ libtwaalgos_la_SOURCES = \
   remprop.cc \
   relabel.cc \
   strength.cc \
-  safra.cc \
   sbacc.cc \
   sccinfo.cc \
   sccfilter.cc \