[fonts] move OFL-1.1 license to a higher directory

There's a bunch of font directories inside of test/ for which the vast
majority of fonts are licensed under the SIL open font license. We currently
have a COPYING file in test/shape/data/in-house/COPYING that says that most
of the fonts are OFL-1.1, but that doesn't apply to the fonts in, say,
test/api/fonts/ or test/fuzzing/fonts/. Since there are so many OFL-1.1
fonts all over test, let's move the COPYING file to the top-level test/
directory.

test/Makefile.am

@@ -1,7 +1,7 @@
 # Process this file with automake to produce Makefile.in
 
 NULL =
-EXTRA_DIST =
+EXTRA_DIST = COPYING
 SUBDIRS = api shape subset fuzzing threads
 
 EXTRA_DIST += \

test/shape/data/in-house/Makefile.am

@@ -7,7 +7,6 @@ lib:
 	@$(MAKE) $(AM_MAKEFLAGS) -C $(top_builddir)/src lib
 
 EXTRA_DIST = \
-	COPYING \
 	fonts \
 	meson.build \
 	$(TESTS) \