dev-util/ots: fix patch

Closes: https://bugs.gentoo.org/835882
Signed-off-by: Alessandro Barbieri <lssndrbarbieri@gmail.com>

dev-util/ots/files/ots-8.2.1-meson-gtest.diff

@@ -0,0 +1,21 @@
+--- a/meson.build
++++ b/meson.build
+@@ -244,6 +244,7 @@ if cxx.has_header('sys/time.h')
+ 
+ 
+ # https://mesonbuild.com/Dependencies.html#gtest-and-gmock
++if get_option('tests')
+ gtest = dependency('gtest', main : true, fallback : ['gtest', 'gtest_main_dep'])
+ 
+ cff_charstring = executable('cff_charstring',
+@@ -283,3 +283,4 @@ test('test_fuzzed_fonts',
+     suite: 'fuzzing',
+   )
+ endforeach
++endif
+--- a/meson_options.txt
++++ b/meson_options.txt
+@@ -1,2 +1,3 @@
++option('tests', type : 'boolean', value : false, description : 'Enable tests')
+ option('graphite', type : 'boolean', value : true, description : 'Sanitize Graphite tables')
+ option('fuzzer_ldflags', type: 'string', description : 'Extra LDFLAGS used during linking of fuzzing binaries')

dev-util/ots/ots-8.2.1.ebuild

@@ -32,7 +32,7 @@ DOCS=(
 	docs/{DesignDoc,HowToFix,HowToTest}.md
 )
 
-PATCHES=( "${FILESDIR}/meson-gtest.diff" )
+PATCHES=( "${FILESDIR}/${P}-meson-gtest.diff" )
 
 src_configure() {
 	local emesonargs=(