dev-libs/croaring: patch the pkgconfig.pc to include roaring

Otherwise pyroaring (the only reverse dependency) fails to #include:
  fatal error: roaring.h: No such file or directory
``````
Part-off: https://codeberg.org/gentoo/guru/pulls/17
Signed-off-by: zyxhere💭 <zyx@envs.net>

dev-libs/croaring/croaring-4.7.0.ebuild

@@ -25,6 +25,13 @@ BDEPEND="
 	test? ( >=dev-util/cmocka-2.0 )
 "
 
+src_prepare() {
+	# Otherwise pyroaring (the only reverse dependency) isn't able to #include
+	sed -i 's:I${includedir}:I${includedir}/roaring:' roaring.pc.in
+
+	cmake_src_prepare
+}
+
 src_configure() {
 	local mycmakeargs=(
 		# messes with `-march=native` but oh well