initial buildroot for linux 5.15

package/dtach/Config.in

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+config BR2_PACKAGE_DTACH
+	bool "dtach"
+	depends on BR2_USE_MMU # fork()
+	help
+	  dtach is a tiny program that emulates the detach feature of
+	  screen, allowing you to run a program in an environment that
+	  is protected from the controlling terminal and attach to it
+	  later.
+
+	  http://dtach.sourceforge.net/

package/dtach/dtach.hash

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+# Locally computed:
+sha256  5f7e8c835ee49a9e6dcf89f4e8ccbe724b061c0fc8565b504dd8b3e67ab79f82  dtach-0.9.tar.gz
+sha256  32b1062f7da84967e7019d01ab805935caa7ab7321a7ced0e30ebe75e5df1670  COPYING

package/dtach/dtach.mk

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+################################################################################
+#
+# dtach
+#
+################################################################################
+
+DTACH_VERSION = 0.9
+DTACH_SITE = $(call github,crigler,dtach,v$(DTACH_VERSION))
+DTACH_LICENSE = GPL-2.0+
+DTACH_LICENSE_FILES = COPYING
+
+# The Makefile does not have an install target.
+define DTACH_INSTALL_TARGET_CMDS
+	$(INSTALL) -D -m 0755 $(@D)/dtach $(TARGET_DIR)/usr/bin/dtach
+endef
+
+$(eval $(autotools-package))