Add modprobe (toolbox) to generic ramdisk

Added files in ramdisk:
lrwxr-xr-x   1 root     root           15 Jan  1  1970 system/bin/getevent -> toolbox_ramdisk
lrwxr-xr-x   1 root     root           15 Jan  1  1970 system/bin/getprop -> toolbox_ramdisk
lrwxr-xr-x   1 root     root           15 Jan  1  1970 system/bin/modprobe -> toolbox_ramdisk
lrwxr-xr-x   1 root     root           15 Jan  1  1970 system/bin/setprop -> toolbox_ramdisk
lrwxr-xr-x   1 root     root           15 Jan  1  1970 system/bin/start -> toolbox_ramdisk
lrwxr-xr-x   1 root     root           15 Jan  1  1970 system/bin/stop -> toolbox_ramdisk
-rwxr-xr-x   1 root     root       749600 Jan  1  1970 system/bin/toolbox_ramdisk

Bug: 383081955
Test: Presubmit
Change-Id: I5be86a66b34371f6b2ace12e59966469daeb5de4
diff --git a/target/product/generic_ramdisk.mk b/target/product/generic_ramdisk.mk
index 5ecb55f..32277ec 100644
--- a/target/product/generic_ramdisk.mk
+++ b/target/product/generic_ramdisk.mk
@@ -24,6 +24,7 @@
     init_first_stage \
     snapuserd_ramdisk \
     ramdisk-build.prop \
+    toolbox_ramdisk \
 
 # Debug ramdisk
 PRODUCT_PACKAGES += \