package/libcamera: fix install staging typo

This won't enable install to staging unless capitalized.

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit b6141b2aa127cebb29bfff7a0beb392251972092)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libcamera/libcamera.mk

@@ -9,7 +9,7 @@ LIBCAMERA_VERSION = 448393f77ec9e37cb807e8e8d35c1a4877d253d4
 LIBCAMERA_SITE_METHOD = git
 LIBCAMERA_DEPENDENCIES = udev
 LIBCAMERA_CONF_OPTS = -Dtest=false -Ddocumentation=false
-LIBCAMERA_INSTALL_STAGING = yes
+LIBCAMERA_INSTALL_STAGING = YES
 LIBCAMERA_LICENSE = LGPL-2.1+ (library), GPL-2.0+ (utils)
 LIBCAMERA_LICENSE_FILES = \
 	licenses/gnu-gpl-2.0.txt \