script/gen_fuzz.py: don’t include test/fuzz/*fuzz.cpp files on “make dist”

Before this change, when GEN_FUZZ=1 ./bootstrap has filled
Makefile-fuzz-generated.am, the aforementioned files were genetared, and
included on “make dist”.

Likewise, test/fuzz/main-sapi.cpp was sometimes considered by “make dist” and
test/fuzz/tcti/tss2_tcti_fuzzing.h was always forgotten.

Signed-Off-By: Дилян Палаузов <git-dpa@aegee.org>

diff --git a/Makefile-fuzz.am b/Makefile-fuzz.am
index 32dc8bf..e389ef4 100644
--- a/Makefile-fuzz.am
+++ b/Makefile-fuzz.am

@@ -7,6 +7,7 @@
 INCLUDE_DIRS += -I$(srcdir)/test/fuzz/tcti
 TESTS_LIBADD = $(lib_LTLIBRARIES) $(libtss2_mu) $(libtss2_sys) $(libutil)
 
+EXTRA_DIST += test/fuzz/main-sapi.cpp
 # tcti library used for fuzzing
 if ENABLE_TCTI_FUZZING
 libtss2_tcti_fuzzing = test/fuzz/tcti/libtss2-tcti-fuzzing.la
@@ -15,7 +16,8 @@
 test_fuzz_tcti_libtss2_tcti_fuzzing_la_LIBADD   = $(TESTS_LIBADD)
 test_fuzz_tcti_libtss2_tcti_fuzzing_la_SOURCES  = \
     src/tss2-tcti/tcti-common.c src/tss2-tcti/tcti-common.h \
-    test/fuzz/tcti/tcti-fuzzing.c test/fuzz/tcti/tcti-fuzzing.h
+    test/fuzz/tcti/tcti-fuzzing.c test/fuzz/tcti/tcti-fuzzing.h \
+    test/fuzz/tcti/tss2_tcti_fuzzing.h
 endif # ENABLE_TCTI_FUZZING
 
 if ENABLE_FUZZING