dev-util/apitrace: use pkg-config for waffle

Just a quick drive-by workaround as better-than-broken,
haven't really looked at this package nor upstream.

Still needs a bump, but I won't be looking at that.

Closes: https://bugs.gentoo.org/901365
Signed-off-by: Ionen Wolkens <ionen@gentoo.org>

dev-util/apitrace/apitrace-9.0-r3.ebuild

@@ -40,6 +40,7 @@ PATCHES=(
 	"${FILESDIR}"/${P}-disable-multiarch.patch
 	"${FILESDIR}"/${P}-brotli-unbundle.patch
 	"${FILESDIR}"/${P}-libc-dlopen-glibc-2.34.patch
+	"${FILESDIR}"/${P}-pkgconfig-waffle.patch
 )
 
 src_prepare() {

dev-util/apitrace/files/apitrace-9.0-pkgconfig-waffle.patch

@@ -0,0 +1,14 @@
+waffle's upstream intentionally does not ship cmake files anymore
+(just a quick fix that works for us, there may be more to consider)
+
+https://bugs.gentoo.org/901365
+https://gitlab.freedesktop.org/mesa/waffle/-/issues/74
+https://gitlab.freedesktop.org/mesa/waffle/-/commit/a16983fea590491727c8119256c7b938fe1f9d10
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -195,3 +195,4 @@
+     # Use Waffle for eglretrace
+-    find_package (Waffle REQUIRED)
++    find_package(PkgConfig REQUIRED)
++    pkg_check_modules(Waffle REQUIRED waffle-1)
+ endif ()