dev-cpp/fast_float: Remove -Werror flag from tests

Closes: https://bugs.gentoo.org/924112

Signed-off-by: Steffen Winter <steffen.winter@proton.me>

dev-cpp/fast_float/fast_float-6.1.1.ebuild

@@ -25,5 +25,8 @@ src_configure() {
 		# Unconditionally calls FetchContent
 		-DFASTFLOAT_SUPPLEMENTAL_TESTS=OFF
 	)
+
+	sed -i 's/-Werror//' tests/CMakeLists.txt || die
+
 	cmake_src_configure
 }