dev-qt/qtwebengine: add missing stdint include

Haven't tested building, but it is missing either way and shouldn't be.

Won't bother updating patchset over this until need to pull in more
changes if ever (already fixed in 6.10.0 w/ chromium-134.x which has
become more concious of these).

Closes: https://bugs.gentoo.org/963965
Signed-off-by: Ionen Wolkens <ionen@gentoo.org>

dev-qt/qtwebengine/files/qtwebengine-6.9.3-stdint.patch

@@ -0,0 +1,10 @@
+Patch status: fixed in Qt 6.10.0
+
+https://bugs.gentoo.org/963965
+https://crrev.com/9601031014144758140fd38a942bce4090ce5c31
+--- a/src/3rdparty/chromium/extensions/common/stack_frame.h
++++ b/src/3rdparty/chromium/extensions/common/stack_frame.h
+@@ -8,2 +8,3 @@
+ #include <stddef.h>
++#include <stdint.h>
+ 

dev-qt/qtwebengine/qtwebengine-6.9.3.ebuild

@@ -109,6 +109,7 @@ PATCHES=( "${WORKDIR}"/patches/${PN} )
 PATCHES+=(
 	# add extras as needed here, may merge in set if carries across versions
 	"${FILESDIR}"/${PN}-6.9.3-QTBUG-139424.patch
+	"${FILESDIR}"/${PN}-6.9.3-stdint.patch
 )
 
 python_check_deps() {